Moss or liverwort? - Plantlife
Moss or liverwort? - Plantlife
Moss or liverwort? - Plantlife
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LIVERWORTS<br />
MOSSES<br />
LIVERWORTS<br />
Heller’s Notchw<strong>or</strong>t (Anastrophyllum hellerianum)<br />
Hatcher’s Paw-w<strong>or</strong>t (Barbilophozia hatcheri)<br />
Above - Left: a thallose liverw<strong>or</strong>t, Overleaf Pellia (Pellia<br />
epiphylla) with fruits; right: a leafy liverw<strong>or</strong>t with round<br />
leaves, Autumn Flapw<strong>or</strong>t (Jamesoniella autumnalis).<br />
Abbreviations<br />
Further inf<strong>or</strong>mation<br />
Books<br />
British <strong>Moss</strong>es and liverw<strong>or</strong>ts: a field guide. British Bryological Society (2010). The first comprehensive colour field guide to<br />
bryophytes with good keys and hundreds of photos.<br />
<strong>Moss</strong>es and Liverw<strong>or</strong>ts; G<strong>or</strong>don Rothero (2005). A brief, general introduction to Scottish bryophytes, part of the ‘Naturally<br />
Scottish’ series published by Scottish Natural Heritage, Battleby.<br />
Bryophytes of native woods – a field guide to common mosses and liverw<strong>or</strong>ts of Scotland’s native woods. Carol L Crawf<strong>or</strong>d<br />
(2002), Native Woodlands Discussion Group. A small booklet with good colour photos.<br />
<strong>Moss</strong>es and Liverw<strong>or</strong>ts. New Naturalist 97, P<strong>or</strong>ley RD & Hodgetts NG, (2005). Collins. An accessible account of our bryophyte<br />
heritage with a good section on woodlands.<br />
The geographical relationships of British and Irish bryophytes; Hill MO & Preston CD (1998). Journal of Bryology, 20: 127-226.<br />
Inf<strong>or</strong>mation and advice<br />
www.britishbryologicalsociety.<strong>or</strong>g.uk. The British Bryological Society has an excellent website with useful inf<strong>or</strong>mation on<br />
publications, courses, field meetings and lots of pictures.<br />
www.nwdg.<strong>or</strong>g.uk. The Native Woodland Discussion Group runs courses on Atlantic mosses and liverw<strong>or</strong>ts.<br />
Advice and Supp<strong>or</strong>t<br />
<strong>Plantlife</strong> Scotland can help you in your quest f<strong>or</strong> inf<strong>or</strong>mation and supp<strong>or</strong>t.<br />
<strong>Plantlife</strong> Scotland, Balallan House, Allan Park, Stirling, FK8 2QG<br />
Tel: +44 (0) 1786 478509 www.plantlife.<strong>or</strong>g.uk Scotland@plantlife.<strong>or</strong>g.uk<br />
© March 2010 ISBN 978-1-907141-24-9<br />
<strong>Plantlife</strong> Scotland is part of <strong>Plantlife</strong> International – the Wild Plant Conservation charity, a charitable company limited by guarantee. Registered in<br />
Scotland (SC038951) and in England and Wales (1059559). Registered company no 3166339.<br />
This guide has been written and illustrated f<strong>or</strong> <strong>Plantlife</strong> Scotland by G<strong>or</strong>don Rothero.<br />
All photos © G<strong>or</strong>don Rothero unless otherwise stated. Cover photo © Laurie Campbell.<br />
Key features f<strong>or</strong> identifying<br />
liverw<strong>or</strong>ts<br />
Growth f<strong>or</strong>m. There are two s<strong>or</strong>ts of liverw<strong>or</strong>ts; leafy<br />
liverw<strong>or</strong>ts have a stem and leaves and resemble a<br />
moss, whereas thallose <strong>or</strong> thalloid liverw<strong>or</strong>ts have a<br />
simple strap of tissue with no stem <strong>or</strong> leaves. Leafy<br />
liverw<strong>or</strong>ts can f<strong>or</strong>m erect cushions and turfs while some<br />
are creeping and closely apressed to rock <strong>or</strong> tree. The<br />
size of the plant is also imp<strong>or</strong>tant; a number of oceanic<br />
liverw<strong>or</strong>ts are very, very small.<br />
Leaf shape. This is all-imp<strong>or</strong>tant in leafy liverw<strong>or</strong>ts and<br />
is much m<strong>or</strong>e variable than in mosses. Liverw<strong>or</strong>t leaves<br />
can be simple and round, they can be deeply divided<br />
into filaments <strong>or</strong> into broader lobes, the lobes can be<br />
of different sizes and can be bent over <strong>or</strong> under each<br />
other and f<strong>or</strong>med into flaps <strong>or</strong> pouches. Many liverw<strong>or</strong>ts<br />
also have pronounced teeth on the margin of the leaf,<br />
visible without a hand lens. Many leafy liverw<strong>or</strong>ts also<br />
have under-leaves, usually much smaller than the main<br />
leaves, and on the lower side of the stem.<br />
Photoset Left - A variety of leafy liverw<strong>or</strong>t leaves, clockwise<br />
from top left: Tayl<strong>or</strong>’s Flapw<strong>or</strong>t (Mylia tayl<strong>or</strong>i), Prickly<br />
Featherw<strong>or</strong>t (Plagiochila spinulosa), Ciliated Fringew<strong>or</strong>t<br />
(Ptilidium ciliare), White earw<strong>or</strong>t (Diplophyllum albicans -<br />
note upper lobe bent over the top of the lower and the line<br />
of longer cells), Common Paw-w<strong>or</strong>t (Barbilophozia floerkei),<br />
Bifid Crestw<strong>or</strong>t (Lophocolea bidentata), Creeping Fingerw<strong>or</strong>t<br />
(Lepidozia reptans), part of stem with ‘fingered’ leaves.<br />
NR – nationally rare; NS – nationally scarce; BAP – a Biodiversity Action Plan species;<br />
S8 – listed on Schedule 8 of the Wildlife and Countryside Act (1981).<br />
Above - Left: acrocarpous Scott’s F<strong>or</strong>k moss (Dicranum<br />
scottianum) ; right: pleurocarpous Larger Mouse-tail<br />
<strong>Moss</strong> (Isothecium alopecuroides).<br />
Above - Irregular branching in Red-stemmed Feathermoss<br />
(Pleurozium schreberi) on the left and regular<br />
tri-pinnate branching in Glittering Wood-moss<br />
(Hylocomium splendens) on the right; note the red stems.<br />
Photoset above - A variety of moss-leaf shapes, clockwise<br />
from top left: Dotted Thyme-moss (Rhizomnium<br />
punctatum), Catherine’s <strong>Moss</strong> (Atrichum undulatum),<br />
Little Shaggy-moss (Rhytidiadelphus l<strong>or</strong>eus), Yellow<br />
Fringe-moss (Racomitrium aciculare), Common Striated<br />
Feather-moss (Eurhynchium striatum), Cypress-leaved<br />
Plait-moss (Hypnum cupressif<strong>or</strong>me).<br />
<strong>Moss</strong> <strong>or</strong> liverw<strong>or</strong>t?<br />
Key features f<strong>or</strong> identifying<br />
<strong>Moss</strong>es<br />
Growth f<strong>or</strong>m. Leaving aside the very distinctive bogmosses<br />
(Sphagnum), mosses can be split into two<br />
groups, acrocarpous and pleurocarpous. There is a<br />
technical difference between these two f<strong>or</strong>ms but in<br />
practical terms, acrocarps usually have erect stems<br />
and grow in cushions <strong>or</strong> turfs while pleurocarps tend<br />
to grow with main stems parallel to the ground (<strong>or</strong> rock<br />
<strong>or</strong> tree trunk) and f<strong>or</strong>m wefts. The often dense growth<br />
f<strong>or</strong>m of acrocarps means that their sparse branches<br />
are obscured while in pleurocarps the branches are<br />
usually many and easily seen.<br />
Branching. F<strong>or</strong> some of the pleurocarps it is useful<br />
to note what the pattern of branching looks like. Is<br />
it regular with branches m<strong>or</strong>e <strong>or</strong> less opposite each<br />
other on the main stem (pinnate) <strong>or</strong> irregular? Are<br />
the regular branches branched again (bi-pinnate) and<br />
again (tri-pinnate) giving a fern-like structure?<br />
Colour. Colour and texture are all-imp<strong>or</strong>tant field<br />
characters. Many species have a particular shade,<br />
admittedly usually of green, which coupled with<br />
the structure of stem and leaf, gives a texture which<br />
is what the eye picks up from a distance. Another<br />
imp<strong>or</strong>tant colour is that of the main stem; when<br />
the leaves are dry they become opaque and it may<br />
be necessary to scrape away some leaves with your<br />
fingernail to see the stem colour.<br />
Leaf shape. <strong>Moss</strong> leaves have a variety of shapes but<br />
they tend to be variations on the same theme, with<br />
a relatively broad base tapering to a narrower apex.<br />
Some leaves are long and narrow and taper to a fine<br />
point, others have a broad triangular shape tapering<br />
sh<strong>or</strong>tly to a sharp point. Other mosses have leaves<br />
with a blunt apex and a few species have round leaves.<br />
Another useful character is whether <strong>or</strong> not the leaves<br />
are all curved in the same direction (falcate) <strong>or</strong> bent<br />
back from the stem (reflexed <strong>or</strong> squarrose). Some<br />
leaves also have teeth on the margin, usually visible<br />
only with a hand lens.<br />
Nerve (<strong>or</strong> costa). A very useful character is whether<br />
the moss leaf has a nerve <strong>or</strong> not. The nerve (<strong>or</strong> costa)<br />
is a thickened rib of tissue running up the centre of<br />
the leaf which looks like a dark line if the leaf is held<br />
against the light and viewed with the hand-lens. It<br />
usually extends beyond halfway up the leaf and may<br />
reach the apex.<br />
Initially this is a tricky question but with a little experience it ceases to be a problem. Thallose liverw<strong>or</strong>ts are<br />
easy but leafy liverw<strong>or</strong>ts can be passed over as mosses by the uninitiated. In most mosses the leaves grow all<br />
around the stem but in most liverw<strong>or</strong>ts the main leaves are in two ranks down each side of the stem, sometimes<br />
with a line of smaller under-leaves below. Most moss leaves are roughly triangular, wide at the base and narrow<br />
to the apex; few liverw<strong>or</strong>ts are like that. <strong>Moss</strong> leaves never have lobes whereas many leafy liverw<strong>or</strong>ts do. Most<br />
mosses with round leaves have a nerve; no leafy liverw<strong>or</strong>ts have a nerve but a few have lines of cells running up<br />
the centre of the leaf.<br />
Michael Lüth<br />
Leafy liverw<strong>or</strong>t NS; size: very small and f<strong>or</strong>ming thin patches<br />
of upright stems; colour: yellow <strong>or</strong> yellow green with shoot<br />
tips red with gemmae; leaves: tiny with two lobes but hardly<br />
visible even with a lens; habitat: on well-rotted, rather damp<br />
logs; note: not easy to see without putting your nose to the<br />
log but once spotted easily recognised by the erect stems<br />
with red tips.<br />
H<strong>or</strong>ned Flap-w<strong>or</strong>t (Lophozia longidens)<br />
Leafy liverw<strong>or</strong>t NS; size: small and f<strong>or</strong>ming loose patches<br />
of n<strong>or</strong>mally procumbent stems; colour: mid <strong>or</strong> dark green<br />
with some shoot tips red with gemmae; leaves: rectangular<br />
in outline but with two pointed lobes with an acute gap<br />
between them, the leaves near the stem apex having dark red<br />
gemmae (lens); habitat: often present on the older, sprawling<br />
stems of juniper and also on thin peaty soil on rocks; note:<br />
the red gemmae and the relatively long sharp lobes are<br />
characteristic.<br />
Curled Notchw<strong>or</strong>t (Anastrophyllum saxicola)<br />
Leafy liverw<strong>or</strong>t NR; size: medium sized but often f<strong>or</strong>ming<br />
large dense cushions of erect stems; colour: yellow <strong>or</strong><br />
greenish brown, occasionally with a reddish tinge; leaves:<br />
complex, two lobed with the smaller upper lobe folded up over<br />
the larger lower lobe, the lower lobe is concave and the top<br />
edge of the upper lobe is turned in towards the stem; habitat:<br />
on thin peaty soil on rocks and in scree; note: a rare species<br />
of scree, the dense patches of erect stems with closely set,<br />
bilobed leaves are usually easily identified.<br />
Michael Lüth<br />
Michael Lüth<br />
Leafy liverw<strong>or</strong>t; size: small to medium-sized f<strong>or</strong>ming tight<br />
patches of erect stems; colour: mid <strong>or</strong> yellow green, often with<br />
some shoot tips red with gemmae; leaves: rounded-rectangular<br />
in outline but with three <strong>or</strong> four lobes, each lobe usually ending<br />
in a little sharp point (lens); underleaves: usually visible with<br />
a lens, with two long pointed lobes; habitat: on thin peaty soil<br />
on rocks and in scree; note: a very similar and equally common<br />
species, Common Paw-w<strong>or</strong>t (Barbilophozia floerkei), never has<br />
gemmae and lacks points on the lobes<br />
Monster Paw-w<strong>or</strong>t (Tetralophozia setif<strong>or</strong>mis)<br />
Leafy liverw<strong>or</strong>t NS; size: small to medium sized but often<br />
f<strong>or</strong>ming large dense cushions of erect stems; colour: yellow<br />
<strong>or</strong> sometimes <strong>or</strong>ange <strong>or</strong> dark brown; leaves: inserted close<br />
together across the stem with up to four long pointed lobes with<br />
a narrow gap in between, lobes erect and pointing up the stem;<br />
underleaves: large and with two lobes; habitat: on thin peaty<br />
soil on rocks and in scree; note: a characteristic species of dry<br />
scree in eastern hills and readily recognised by the tight cushions<br />
of erect stems and narrow lobes on the closely-set leaves.<br />
Ciliated Fringew<strong>or</strong>t (Ptilidium ciliare)<br />
Leafy liverw<strong>or</strong>t; size: medium-sized but often f<strong>or</strong>ming large<br />
cushions <strong>or</strong> patches; branching: irregularly pinnate, occasionally bipinnate,<br />
at right-angles to the stem, the branches blunt at the end<br />
colour: usually some shade of yellow but may be variegated red,<br />
green <strong>or</strong> brownish; leaves: two lobes but the most noticeable feature<br />
is the margin which has lots of long narrow teeth (cilia) easily visible<br />
with a lens; underleaves: similar in shape to the main leaves but<br />
much smaller; habitat: on well-drained sites with other bryophytes<br />
amongst ericaceous shrubs, in heathy grassland and in woodland;<br />
note: confusion only possible with the related but much smaller<br />
Tree Fringew<strong>or</strong>t (Ptilidium pulcherimum) and Wood’s Whipw<strong>or</strong>t<br />
(Mastigoph<strong>or</strong>a woodsii) a scarce western oceanic species of humid<br />
sites which has longer branches tapering to a point.<br />
Bryophytes of<br />
Scotland’s pine woodlands<br />
British Lichen Society
Introduction<br />
This <strong>Plantlife</strong> field guide will help those who want to<br />
go a little further in identifying the carpets of mosses<br />
and liverw<strong>or</strong>ts that are such an obvious feature of<br />
many of our Scots pine woodlands. This guide deals<br />
with some of the typical species and a few of the m<strong>or</strong>e<br />
uncommon and rare species of particular habitats<br />
within the woodland. It is focused largely on the<br />
woodlands of the east of Scotland, so, f<strong>or</strong> the pine<br />
woods of the west, particularly Beinn Eighe, the guides<br />
f<strong>or</strong> Atlantic woodland would be m<strong>or</strong>e useful.<br />
What are pine woodlands?<br />
They are semi-natural stands of woodland where Scots<br />
pine f<strong>or</strong>ms a significant prop<strong>or</strong>tion of the canopy.<br />
Within these woodlands pine <strong>or</strong> birch may be the<br />
dominant tree and there will also be rowan, aspen<br />
and m<strong>or</strong>e locally alder and willows, especially along<br />
water-courses. Some woodlands, mostly in the east<br />
of Scotland, have a patchy underst<strong>or</strong>y of juniper and<br />
occasionally of hazel.<br />
What are mosses and liverw<strong>or</strong>ts?<br />
<strong>Moss</strong>es and liverw<strong>or</strong>ts (collectively known as<br />
bryophytes) are two of the oldest groups of land plants<br />
and have had millions of years to evolve a variety of<br />
species that have colonised almost all habitats apart<br />
from the sea. Most have a simple structure with a<br />
main stem and m<strong>or</strong>e <strong>or</strong> less frequent branches covered<br />
in leaves. They do not have roots but abs<strong>or</strong>b water and<br />
minerals directly into the (usually) single layer of cells<br />
in the leaves. Though some bryophytes are strongly<br />
coloured, often red <strong>or</strong> purple, most are some shade<br />
of green and an appreciation of the many shades of<br />
green is a useful quality in anyone wishing to identify<br />
these small plants.<br />
Why are the mosses and liverw<strong>or</strong>ts imp<strong>or</strong>tant?<br />
Bryophytes in woodland are an excellent indicat<strong>or</strong><br />
of habitat quality and contribute much to the<br />
functioning of the woodland ecosystem, as well as<br />
giving character and aesthetic appeal. The UK has<br />
some 1100 species of bryophyte, approximately 65%<br />
of the European fl<strong>or</strong>a; in comparison our vascular<br />
plants total only 15%. Our remnants of Atlantic<br />
woodland have as great a diversity of bryophytes as<br />
almost anywhere else on the planet. Our pinewoods<br />
are less diverse but have a m<strong>or</strong>e continental fl<strong>or</strong>a and<br />
affinities with the f<strong>or</strong>ests of Scandinavia and include a<br />
number of Biodiversity Action Plan (BAP) species that<br />
are rare <strong>or</strong> absent elsewhere in the UK.<br />
Bryophyte communities<br />
A number of the plants illustrated in this guide are<br />
very precise as to the habitat they need but it is<br />
possible to group species into broad communities<br />
within the pinewoods. It needs to be emphasised that<br />
there will be an overlap as large woodland flo<strong>or</strong> species<br />
can cover rocks and the species on rocks and the bases<br />
of trees are often the same.<br />
Woodland flo<strong>or</strong>: on the soil of the woodland flo<strong>or</strong>,<br />
species have to compete with flowering plants and<br />
with the accumulation of leaf litter and so the mosses<br />
here tend to be large and relatively fast-growing.<br />
Where the woodland is heathy, as is common<br />
under pine and birch, the dominant bryophytes are<br />
large pleurocarpous species like Glittering Woodmoss<br />
(Hylocomium splendens), Big Shaggy-moss<br />
(Rhytidiadelphus triquetrus), Red-stemmed Feathermoss<br />
(Pleurozium schreberi), Heath Plait-moss<br />
(Hypnum jutlandicum), Ostrich-plume Feather-moss<br />
(Ptilium crista-castrensis) and, in m<strong>or</strong>e humid woods,<br />
Red Bog-moss (Sphagnum capillifolium), Little<br />
Shaggy-moss (Rhytidiadelphus l<strong>or</strong>eus) and Waved<br />
Silk-moss (Plagiothecium undulatum). These species<br />
are often abundant and occur to the exclusion of all<br />
else. In drier woodland with a m<strong>or</strong>e complete pine<br />
canopy, the flo<strong>or</strong> may be m<strong>or</strong>e open with areas of bare<br />
pine needles; here there are often dense cushions of<br />
Broom F<strong>or</strong>k-moss (Dicranum scoparium) and Dusky<br />
F<strong>or</strong>k-moss (Dicranum fuscescens) running up onto the<br />
tree bases.<br />
Rocks, crags and scree: Within pine woodland there<br />
are often areas of crag and scree which have some<br />
characteristic species. Grey carpets of Woolly Fringemoss<br />
(Racomitrium lanuginosum) are common and<br />
cushions of Dusky F<strong>or</strong>k-moss (Dicranum fuscescens)<br />
are frequent and there may be patches of the liverw<strong>or</strong>t<br />
Hatcher’s Paw-w<strong>or</strong>t (Barbilophozia hatcheri). Two<br />
characteristic species of scree are the liverw<strong>or</strong>ts<br />
Monster Paw-w<strong>or</strong>t (Tetralophozia setif<strong>or</strong>mis) which<br />
is quite common here and the rare Curled Notchw<strong>or</strong>t<br />
(Anastrophyllum saxicola).<br />
Trees and logs: Bryophytes do not like pine bark and<br />
are usually limited to the base of the tree. The fl<strong>or</strong>a on<br />
birch is also po<strong>or</strong> but where there are hazels <strong>or</strong> aspens<br />
the fl<strong>or</strong>a can be quite rich, particularly with species<br />
of Bristle-mosses (Orthotrichum). Dead wood can<br />
often provide a humid habitat and has an interesting<br />
fl<strong>or</strong>a; in damp places species like Wood-rust (Nowellia<br />
curvifolia) and Palmate Germanderw<strong>or</strong>t (Riccardia<br />
palmata) are common and good logs may have the<br />
tiny liverw<strong>or</strong>t Heller’s Notchw<strong>or</strong>t (Anastrophyllum<br />
hellerianum) and the rare moss Green Shield-moss<br />
(Buxbaumia viridis).<br />
‘Bryologising’<br />
Although identifying species initially needs a<br />
modicum of determination, it is possible to quite<br />
quickly become familiar with the common mosses and<br />
liverw<strong>or</strong>ts in pine woodlands. They have the virtue of<br />
being available all the year round and grow in really<br />
nice places. Though some of the species are very<br />
distinct, even from some metres away, the process<br />
and the enjoyment will be enhanced if you get used<br />
to using a hand-lens (at least x10) to reveal the finer<br />
features on which identification sometimes depends.<br />
In the descriptions, where a lens is necessary, it is<br />
indicated by (lens); remember, hand-lens to the eye<br />
and move the plant into focus.<br />
In these guides, English names have been used<br />
alongside the Latin; these are not ‘common names’<br />
in the same sense as those f<strong>or</strong> flowers because they<br />
are all recent inventions and as yet are hardly used<br />
except in publications like this! Latin names should<br />
always be used f<strong>or</strong> rec<strong>or</strong>ding purposes to avoid any<br />
ambiguity.<br />
MOSSES<br />
Green Shield-moss (Buxbaumia viridis)<br />
NR, BAP, S8; fruit: The leaves of this strange moss<br />
are too tiny to see and it is only the large capsule<br />
that attracts attention, resembling a ‘bug-on-astick’.<br />
This capsule is 5mm <strong>or</strong> so long on a stem of<br />
about the same length and held erect when young<br />
and at m<strong>or</strong>e of an angle when mature. Bright green<br />
in the winter, brown and peeling when mature in<br />
the summer; habitat: most sites are on rotting logs<br />
<strong>or</strong> stumps but it has been found on old wood-ant<br />
nests and rarely on bark of living trees; note: a<br />
Schedule 8 species so should not be disturbed.<br />
Waved Silk-moss<br />
(Plagiothecium undulatum)<br />
Pleurocarpous; size: robust and usually f<strong>or</strong>ming<br />
large patches; branching: sparse and irregular;<br />
colour: typically a whitish green; stem: green;<br />
leaves: rounded-triangular, tapering sh<strong>or</strong>tly to<br />
a point and with distinct undulations running<br />
across the leaf, no nerve; habitat: woodland flo<strong>or</strong>,<br />
ledges, boulder tops; note: the whitish-green colour<br />
resembling ‘white w<strong>or</strong>ms’ and the undulate leaves<br />
make this an easy moss to recognise.<br />
Broom F<strong>or</strong>k-moss (Dicranum scoparium)<br />
Acrocarpous; size: medium-sized and usually<br />
f<strong>or</strong>ming cushions and occasionally tight turfs;<br />
branching: obscured; colour: mid-green, leaves:<br />
long, very narrowly triangular with a toothed apex;<br />
leaves often curved in one direction; habitat: on<br />
drier open parts of the woodland flo<strong>or</strong>, often on pine<br />
litter in bare areas and often around the base of pine<br />
trees, but also on rocks and logs; note: the much<br />
larger Greater F<strong>or</strong>k-moss (Dicranum majus) is also<br />
common in m<strong>or</strong>e humid woodland, it has very long,<br />
regularly curved leaves.<br />
Red-stemmed Feather-moss<br />
(Pleurozium schreberi)<br />
Pleurocarpous; size: robust and usually f<strong>or</strong>ming<br />
large patches; branching: irregular and rather<br />
untidy; colour: mid to yellow-green and ‘chaffy’<br />
when dry; stem: red; leaves: rather roundedtriangular,<br />
tapering to a blunt point, no nerve;<br />
habitat: woodland flo<strong>or</strong>, ledges, boulder tops<br />
Dusky F<strong>or</strong>k-moss (Dicranum fuscescens)<br />
Acrocarpous; size: medium-sized and usually<br />
f<strong>or</strong>ming cushions and occasionally tight turfs;<br />
branching: obscured; colour: mid-to dark green,<br />
leaves: long, very narrowly triangular with a<br />
fine, toothed apex (lens), leaves often curved in<br />
one direction; habitat: on drier open parts of the<br />
woodland flo<strong>or</strong>, often on pine litter in bare areas<br />
and often around the base of pine trees, but also<br />
on rocks and logs; note: easily confused with<br />
Broom F<strong>or</strong>k-moss (Dicranum scoparium) but the<br />
fine, wispy apex is distinctive, particularly when<br />
dry.<br />
Common Haircap (Polytrichum commune)<br />
Bristly Haircap (Polytrichum piliferum)<br />
Acrocarpous; size: very large and f<strong>or</strong>ming large<br />
hummocks <strong>or</strong> lawns; branching: sparse and<br />
obscure; colour: dark green; leaves: a white base<br />
that clasps the stem, above narrowly triangular to<br />
a sh<strong>or</strong>tly pointed apex and strongly toothed; the<br />
leaves are opaque and look thick because of the<br />
numerous lamellae on the upper surface; habitat:<br />
in damper areas and boggy ground; note: the<br />
largest of several similar species in the woodlands;<br />
also illustrated is Bristly Haircap (Polytrichum<br />
piliferum) a much smaller plant with a white hair<br />
point which grows in drier places like rock tops<br />
(N.B. the pictures are not to scale).<br />
Rusty F<strong>or</strong>k-moss (Dicranum spurium)<br />
Acrocarpous NS, BAP; Size: medium-sized and<br />
f<strong>or</strong>ming open turfs <strong>or</strong> just scattered stems; branching:<br />
obscured; colour: yellow to mid-green, leaves:<br />
tapering abruptly from a broad base to a fine apex,<br />
irregularly undulate and concave giving the shoots a<br />
fat appearance; habitat: most frequent on thin peat<br />
under open, ‘leggy’ heather on moderate to steep<br />
slopes but also occurring in damper heath; note: a<br />
very different ‘habit’ from other Dicranum species and<br />
might be overlooked as the common moss Swans-neck<br />
Thyme-moss (Mnium h<strong>or</strong>num) when dry.<br />
Ostrich-plume Feather-moss<br />
(Ptilium crista-castrensis)<br />
Pleurocarpous; size: robust and often f<strong>or</strong>ming<br />
large patches; branching: very closely pinnate and<br />
so feather-like hence the English name; colour:<br />
mid to yellow-green; stem: green and furry with<br />
green filaments under the lens; leaves: narrowly<br />
triangular, tapering to a long fine point, no nerve,<br />
all strongly curved in one direction; habitat:<br />
woodland flo<strong>or</strong>, ledges, boulder tops; note: a<br />
beautiful and easily recognisable moss and very<br />
characteristic of pinewoods.<br />
Wavy F<strong>or</strong>k-moss (Dicranum undulatum)<br />
Acrocarpous NS, BAP; size: medium to robust<br />
and f<strong>or</strong>ming dense cushions which can be large;<br />
branching: obscured; colour: yellow to olive-green,<br />
leaves: long, narrowly triangular with a rather sh<strong>or</strong>t,<br />
toothed apex, regularly and strongly undulate;<br />
habitat: in boggy areas within the woodland where<br />
there has been little disturbance; note: the olive-green<br />
colour and the habit and habitat are useful characters<br />
but this is a difficult plant to spot despite its size.<br />
Big Shaggy-moss<br />
(Rhytidiadelphus triquetrus)<br />
Pleurocarpous; size: very robust and often<br />
f<strong>or</strong>ming large patches; branching: irregular<br />
and rather untidy; colour: yellow-green, strawcoloured<br />
when dry; stem: red but often obscured<br />
by the leaves; leaves: triangular, pale yellow-green<br />
and again rather untidy; habitat: woodland flo<strong>or</strong>,<br />
ledges, boulder tops; note: easily recognised by<br />
the large, erect stems and untidy, ‘chaffy’ leaves.<br />
Glittering Wood-moss<br />
(Hylocomium splendens)<br />
Pleurocarpous; size: robust and usually f<strong>or</strong>ming<br />
large patches; branching: regular with branches<br />
branched again, like a small fern; colour: mid to<br />
yellow-green, often ‘chaffy’ when dry; stem: red,<br />
springy; new growth emerging from old frond and<br />
may f<strong>or</strong>m several layers of fronds, hence ‘stepstair<br />
moss’; leaves: broadly triangular, no nerve;<br />
habitat: woodland flo<strong>or</strong>, ledges, boulder tops.<br />
Little Shaggy-moss<br />
(Rhytidiadelphus l<strong>or</strong>eus)<br />
Pleurocarpous; size: robust and usually f<strong>or</strong>ming<br />
large patches; branching: irregular; colour: mid to<br />
yellow-green; stem: red, springy; leaves: broadly<br />
triangular, no nerve; curved in one direction<br />
so that the stem ends look hooked; habitat:<br />
woodland flo<strong>or</strong>, ledges, boulder tops; note: a bit<br />
smaller, neater and greener than Big Shaggy-moss<br />
(Rhytidiadelphus triquetrus), with hooked shoottips,<br />
and usually in m<strong>or</strong>e humid sites, so m<strong>or</strong>e<br />
frequent in the western woods.<br />
Heath Plait-moss (Hypnum jutlandicum)<br />
Pleurocarpous; size: small and f<strong>or</strong>ming untidy<br />
patches <strong>or</strong> straggling stems; branching: irregularly<br />
pinnate with all the branches in the same plane<br />
so the shoots look flat; colour: pale-green, often<br />
whitish when dry; stem: green; leaves: narrow,<br />
rounded-triangular, no nerve and with a fine<br />
pointed tip which is turned down giving the<br />
shoots a ‘plaited’ appearance; habitat: a common<br />
species amongst the heather and blaeberry in<br />
heathy woodland; note: Cypress-leaved Plait-moss<br />
(Hypnum cupressif<strong>or</strong>me), a very common species<br />
in a variety of habitats, is similar but is usually<br />
greener and has less regular branching.<br />
Red Bog-moss (Sphagnum capillifolium)<br />
Bog-moss; size: medium sized and f<strong>or</strong>ming<br />
swelling cushions <strong>or</strong> hummocks of erect<br />
stems and often as a loose turf under heather;<br />
branching: a bunch of tight branches at the top<br />
of the stem (capitulum) and wh<strong>or</strong>ls of branches<br />
below; colour: often red <strong>or</strong> pink but variegated<br />
green in m<strong>or</strong>e shaded sites; leaves: branch leaves<br />
are narrowly triangular ; habitat: an abundant<br />
and locally dominant plant in m<strong>or</strong>e humid<br />
woodland, in valleys <strong>or</strong> on N-facing slopes note:<br />
other species of Bog-moss may occur in the<br />
woodland but this is the most frequent species.
LIVERWORTS<br />
MOSSES<br />
MOSSES<br />
Curve-leaved Bow-moss (Dicranodontium uncinatum)<br />
Woolly Fringe-moss (Racomitrium lanuginosum)<br />
Key features f<strong>or</strong> identifying<br />
liverw<strong>or</strong>ts<br />
Key features f<strong>or</strong> identifying<br />
<strong>Moss</strong>es<br />
Above - Left: a thallose liverw<strong>or</strong>t, Overleaf Pellia (Pellia<br />
epiphylla) with fruits; right: a leafy liverw<strong>or</strong>t with round<br />
leaves, Autumn Flapw<strong>or</strong>t (Jamesoniella autumnalis).<br />
Abbreviations<br />
Further inf<strong>or</strong>mation<br />
Books<br />
British <strong>Moss</strong>es and liverw<strong>or</strong>ts: a field guide. British Bryological Society (2010).<br />
The first comprehensive colour field guide to bryophytes with good keys and hundreds of photos.<br />
<strong>Moss</strong>es and Liverw<strong>or</strong>ts; G<strong>or</strong>don Rothero (2005). A brief, general introduction to Scottish bryophytes,<br />
part of the ‘Naturally Scottish’ series published by Scottish Natural Heritage, Battleby.<br />
Bryophytes of native woods – a field guide to common mosses and liverw<strong>or</strong>ts of Scotland’s native woods.<br />
Carol L Crawf<strong>or</strong>d (2002), Native Woodlands Discussion Group. A small booklet with good colour photos.<br />
<strong>Moss</strong>es and Liverw<strong>or</strong>ts. New Naturalist 97, P<strong>or</strong>ley RD & Hodgetts NG, (2005). Collins.<br />
An accessible account of our bryophyte heritage with a good section on woodlands.<br />
The geographical relationships of British and Irish bryophytes; Hill MO & Preston CD (1998). Journal of Bryology, 20: 127-226.<br />
Inf<strong>or</strong>mation and advice<br />
www.britishbryologicalsociety.<strong>or</strong>g.uk. The British Bryological Society has an excellent<br />
website with useful inf<strong>or</strong>mation on publications, courses, field meetings and lots of pictures.<br />
www.nwdg.<strong>or</strong>g.uk. The Native Woodland Discussion Group runs courses on Atlantic mosses and liverw<strong>or</strong>ts.<br />
Advice and Supp<strong>or</strong>t<br />
<strong>Plantlife</strong> Scotland can help you in your quest f<strong>or</strong> inf<strong>or</strong>mation and supp<strong>or</strong>t.<br />
<strong>Plantlife</strong> Scotland, Balallan House, Allan Park, Stirling, FK8 2QG<br />
Tel: +44 (0) 1786 478509 www.plantlife.<strong>or</strong>g.uk Scotland@plantlife.<strong>or</strong>g.uk<br />
© March 2010 ISBN 978-1-907141-23-2<br />
<strong>Plantlife</strong> Scotland is part of <strong>Plantlife</strong> International – the Wild Plant Conservation charity, a charitable company limited by guarantee.<br />
Registered in Scotland (SC038951) and in England and Wales (1059559). Registered company no 3166339.<br />
This guide has been written and illustrated f<strong>or</strong> <strong>Plantlife</strong> Scotland by G<strong>or</strong>don Rothero<br />
All photos © G<strong>or</strong>don Rothero, unless otherwise stated. Cover photo © Laurie Campbell.<br />
Growth f<strong>or</strong>m. There are two s<strong>or</strong>ts of liverw<strong>or</strong>ts; leafy<br />
liverw<strong>or</strong>ts have a stem and leaves and resemble a<br />
moss, whereas thallose <strong>or</strong> thalloid liverw<strong>or</strong>ts have a<br />
simple strap of tissue with no stem <strong>or</strong> leaves. Leafy<br />
liverw<strong>or</strong>ts can f<strong>or</strong>m erect cushions and turfs while some<br />
are creeping and closely apressed to rock <strong>or</strong> tree. The<br />
size of the plant is also imp<strong>or</strong>tant; a number of oceanic<br />
liverw<strong>or</strong>ts are very, very small.<br />
Leaf shape. This is all-imp<strong>or</strong>tant in leafy liverw<strong>or</strong>ts and<br />
is much m<strong>or</strong>e variable than in mosses. Liverw<strong>or</strong>t leaves<br />
can be simple and round, they can be deeply divided<br />
into filaments <strong>or</strong> into broader lobes, the lobes can be<br />
of different sizes and can be bent over <strong>or</strong> under each<br />
other and f<strong>or</strong>med into flaps <strong>or</strong> pouches. Many liverw<strong>or</strong>ts<br />
also have pronounced teeth on the margin of the leaf,<br />
visible without a hand lens. Many leafy liverw<strong>or</strong>ts also<br />
have under-leaves, usually much smaller than the main<br />
leaves, and on the lower side of the stem.<br />
Photoset Left - A variety of leafy liverw<strong>or</strong>t leaves, clockwise<br />
from top left: Tayl<strong>or</strong>’s Flapw<strong>or</strong>t (Mylia tayl<strong>or</strong>i), Prickly<br />
Featherw<strong>or</strong>t (Plagiochila spinulosa), Ciliated Fringew<strong>or</strong>t<br />
(Ptilidium ciliare), White earw<strong>or</strong>t (Diplophyllum albicans -<br />
note upper lobe bent over the top of the lower and the line<br />
of longer cells), Common Paw-w<strong>or</strong>t (Barbilophozia floerkei),<br />
Bifid Crestw<strong>or</strong>t (Lophocolea bidentata), Creeping Fingerw<strong>or</strong>t<br />
(Lepidozia reptans), part of stem with ‘fingered’ leaves.<br />
NR – nationally rare; NS – nationally scarce; RDL – Red Data List 2001; S8 – listed on Schedule 8 of<br />
the Wildlife and Countryside Act. Oceanic indicates that this is an oceanic species as defined by Hill<br />
and Preston (1998).<br />
Above - Left: acrocarpous Scott’s F<strong>or</strong>k moss (Dicranum<br />
scottianum) ; right: pleurocarpous Larger Mouse-tail<br />
<strong>Moss</strong> (Isothecium alopecuroides).<br />
Above - Irregular branching in Red-stemmed Feathermoss<br />
(Pleurozium schreberi) on the left and regular<br />
tri-pinnate branching in Glittering Wood-moss<br />
(Hylocomium splendens) on the right; note the red stems.<br />
Photoset above - A variety of moss-leaf shapes, clockwise<br />
from top left: Dotted Thyme-moss (Rhizomnium<br />
punctatum), Catherine’s <strong>Moss</strong> (Atrichum undulatum),<br />
Little Shaggy-moss (Rhytidiadelphus l<strong>or</strong>eus), Yellow<br />
Fringe-moss (Racomitrium aciculare), Common Striated<br />
Feather-moss (Eurhynchium striatum), Cypress-leaved<br />
Plait-moss (Hypnum cupressif<strong>or</strong>me).<br />
<strong>Moss</strong> <strong>or</strong> liverw<strong>or</strong>t?<br />
Growth f<strong>or</strong>m. Leaving aside the very distinctive bogmosses<br />
(Sphagnum), mosses can be split into two<br />
groups, acrocarpous and pleurocarpous. There is a<br />
technical difference between these two f<strong>or</strong>ms but in<br />
practical terms, acrocarps usually have erect stems<br />
and grow in cushions <strong>or</strong> turfs while pleurocarps tend<br />
to grow with main stems parallel to the ground (<strong>or</strong> rock<br />
<strong>or</strong> tree trunk) and f<strong>or</strong>m wefts. The often dense growth<br />
f<strong>or</strong>m of acrocarps means that their sparse branches<br />
are obscured while in pleurocarps the branches are<br />
usually many and easily seen.<br />
Branching. F<strong>or</strong> some of the pleurocarps it is useful<br />
to note what the pattern of branching looks like. Is<br />
it regular with branches m<strong>or</strong>e <strong>or</strong> less opposite each<br />
other on the main stem (pinnate) <strong>or</strong> irregular? Are<br />
the regular branches branched again (bi-pinnate) and<br />
again (tri-pinnate) giving a fern-like structure?<br />
Colour. Colour and texture are all-imp<strong>or</strong>tant field<br />
characters. Many species have a particular shade,<br />
admittedly usually of green, which coupled with<br />
the structure of stem and leaf, gives a texture which<br />
is what the eye picks up from a distance. Another<br />
imp<strong>or</strong>tant colour is that of the main stem; when<br />
the leaves are dry they become opaque and it may<br />
be necessary to scrape away some leaves with your<br />
fingernail to see the stem colour.<br />
Leaf shape. <strong>Moss</strong> leaves have a variety of shapes but<br />
they tend to be variations on the same theme, with<br />
a relatively broad base tapering to a narrower apex.<br />
Some leaves are long and narrow and taper to a fine<br />
point, others have a broad triangular shape tapering<br />
sh<strong>or</strong>tly to a sharp point. Other mosses have leaves<br />
with a blunt apex and a few species have round leaves.<br />
Another useful character is whether <strong>or</strong> not the leaves<br />
are all curved in the same direction (falcate) <strong>or</strong> bent<br />
back from the stem (reflexed <strong>or</strong> squarrose). Some<br />
leaves also have teeth on the margin, usually visible<br />
only with a hand lens.<br />
Nerve (<strong>or</strong> costa). A very useful character is whether<br />
the moss leaf has a nerve <strong>or</strong> not. The nerve (<strong>or</strong> costa)<br />
is a thickened rib of tissue running up the centre of<br />
the leaf which looks like a dark line if the leaf is held<br />
against the light and viewed with the hand-lens. It<br />
usually extends beyond halfway up the leaf and may<br />
reach the apex.<br />
Initially this is a tricky question but with a little experience it ceases to be a problem. Thallose liverw<strong>or</strong>ts are<br />
easy but leafy liverw<strong>or</strong>ts can be passed over as mosses by the uninitiated. In most mosses the leaves grow all<br />
around the stem but in most liverw<strong>or</strong>ts the main leaves are in two ranks down each side of the stem, sometimes<br />
with a line of smaller under-leaves below. Most moss leaves are roughly triangular, wide at the base and narrow<br />
to the apex; few liverw<strong>or</strong>ts are like that. <strong>Moss</strong> leaves never have lobes whereas many leafy liverw<strong>or</strong>ts do. Most<br />
mosses with round leaves have a nerve; no leafy liverw<strong>or</strong>ts have a nerve but a few have lines of cells running up<br />
the centre of the leaf.<br />
Oceanic, NS. Acrocarpous moss; size: large and usually<br />
f<strong>or</strong>ming loose cushions within the heath; branching:<br />
obscured; colour: usually a shiny, dark green; stem: often<br />
reddish; leaves: very narrowly triangular, tapering to a very<br />
long, fine point which is f<strong>or</strong>med mostly from the broad<br />
nerve; habitat: in lower stands of the heath, especially<br />
where rocky <strong>or</strong> below crags; note: two very similar species<br />
Beaked Bow-moss (Dicranodontium denudatum) and<br />
Orange Bow-moss (Dicranodontium asperulum) also occur<br />
in oceanic heath.<br />
Red Bog-moss (Sphagnum capillifolium)<br />
Bog-moss; size: medium sized and f<strong>or</strong>ming swelling<br />
cushions <strong>or</strong> hummocks of erect stems but in the oceanic<br />
heath usually as a loose turf under the heather; branching:<br />
a bunch of tight branches at the top of the stem (capitulum)<br />
and wh<strong>or</strong>ls of branches at intervals below; colour: often<br />
red but in the oceanic heath m<strong>or</strong>e frequently green with<br />
varying amounts of red; leaves: branch leaves are narrowly<br />
triangular; habitat: an abundant and locally dominant<br />
plant in hilly areas in both mire and heath; note: other<br />
species of Sphagnum occur in this community but this is<br />
the most frequent species.<br />
Acrocarpous moss; size: large and usually f<strong>or</strong>ming<br />
sprawling patches; branching: unlike most acrocarpous<br />
mosses, there are frequent irregular branches; colour:<br />
usually grey when dry and blackish-green when wet;<br />
stem: green; leaves: narrowly triangular, tapering to a long,<br />
toothed white ‘hair-point’; habitat: an abundant and locally<br />
dominant plant in hilly areas, on rocks and in mire and<br />
heath; note: an imp<strong>or</strong>tant and unmistakeable component<br />
of our upland vegetation and a constant in oceanic heath.<br />
Skye Bog-moss (Sphagnum skyense)<br />
Oceanic, NR. Bog-moss; size: large, twice the size of<br />
Red Bog-moss (Sphagnum capillifolium), and f<strong>or</strong>ming<br />
loose patches in the turf; branching: a bunch of long<br />
branches at the top of the stem (capitulum) giving an<br />
untidy appearance and wh<strong>or</strong>ls of long branches below;<br />
colour: often red <strong>or</strong> pink but with some variegated green ;<br />
leaves: branch leaves are narrowly triangular ; habitat: in<br />
grassy heath and often associated with Juniper Prongw<strong>or</strong>t<br />
(Herbertus aduncus ssp. hutchinsiae), and Carrington’s<br />
Featherw<strong>or</strong>t (Plagiochila carringtonii); note: the size,<br />
colour, long branches and habitat are useful characters;<br />
outside of the west of Scotland only known from one site in<br />
Wales and one in Ireland.<br />
Bryophytes of<br />
Scotland’s oceanic heath<br />
British Lichen Society
Introduction<br />
This <strong>Plantlife</strong> field guide will help those who want to<br />
go a little further in identifying the carpets of mosses<br />
and liverw<strong>or</strong>ts that make our western hills such<br />
special places. This guide deals with species making<br />
up Scotland’s oceanic heath, a globally rare plant<br />
community.<br />
What are mosses and liverw<strong>or</strong>ts?<br />
<strong>Moss</strong>es and liverw<strong>or</strong>ts (collectively known as<br />
bryophytes) are two of the oldest groups of land plants<br />
and have had millions of years to evolve a variety of<br />
species that have colonised almost all habitats apart<br />
from the sea. Most have a simple structure with a<br />
main stem and m<strong>or</strong>e <strong>or</strong> less frequent branches covered<br />
in leaves. They do not have roots but abs<strong>or</strong>b water<br />
and minerals directly into the (usually) single layer of<br />
cells in the leaves. Most bryophytes are some shade<br />
of green but the liverw<strong>or</strong>ts in Scotland’s oceanic heath<br />
are usually strongly coloured, ranging from yellow and<br />
<strong>or</strong>ange, through to reds and purples, to almost black.<br />
What is Scotland’s oceanic heath?<br />
Oceanic heath is a neglected habitat of global<br />
imp<strong>or</strong>tance. Heather and blaeberry are maj<strong>or</strong><br />
components but what makes oceanic heath special<br />
is its ground layer of mosses that only thrive in the<br />
oceanic climate of the hills in the west of Scotland.<br />
This ground layer is also home to a diverse fl<strong>or</strong>a of<br />
large leafy liverw<strong>or</strong>ts that have a highly restricted<br />
global distribution. These rare liverw<strong>or</strong>t species<br />
n<strong>or</strong>mally occur alongside m<strong>or</strong>e common species, such<br />
as Woolly Fringe-moss (Racomitrium lanuginosum),<br />
Red Bog-moss (Sphagnum capillifolium) and<br />
m<strong>or</strong>e widespread liverw<strong>or</strong>ts like Tayl<strong>or</strong>’s Flapw<strong>or</strong>t<br />
(Mylia tayl<strong>or</strong>i) and Orkney Notchw<strong>or</strong>t (Anastrepta<br />
<strong>or</strong>cadensis).<br />
This habitat is also known as ‘Scottish liverw<strong>or</strong>t heath’,<br />
the ‘N<strong>or</strong>thern hepatic mat’ <strong>or</strong> the ‘oceanic-montane<br />
heath’.<br />
Why is Scotland’s oceanic heath imp<strong>or</strong>tant?<br />
Oceanic heath is globally rare. In Europe, it is only<br />
well-developed in Western Scotland, western Ireland<br />
and, to a much m<strong>or</strong>e limited extent, in SW N<strong>or</strong>way.<br />
Globally, some of the same species occur in a similar<br />
community above the tree line in the Sino-Himalaya<br />
and N<strong>or</strong>th-west America.<br />
Most of the constituent liverw<strong>or</strong>t species have a<br />
remarkably disjunct global distribution. F<strong>or</strong> example<br />
Cloud Earw<strong>or</strong>t (Scapania nimbosa), also occurs in W<br />
Ireland (rare), SW N<strong>or</strong>way (one site) Nepal, Sikkim and<br />
Yunnan. The community is also so limited in its UK<br />
distribution that most species are nationally scarce<br />
and some are nationally rare. N<strong>or</strong>thern Prongw<strong>or</strong>t<br />
(Herbertus b<strong>or</strong>ealis) is limited to just one site in<br />
Europe on Beinn Eighe and Lindenberg’s Featherw<strong>or</strong>t<br />
(Adelanthus lindenbergianus) has one site on Islay<br />
(elsewhere in Europe only in W Ireland). We are still<br />
finding out m<strong>or</strong>e about this remarkable community,<br />
with molecular w<strong>or</strong>k revealing two new species in the<br />
past few years.<br />
Where to look f<strong>or</strong> the oceanic heath<br />
This habitat has a patchy distribution from Islay in<br />
the south, up the west coast to Ben Hope, including<br />
hills in the Hebrides with m<strong>or</strong>e limited outposts on<br />
Orkney and Shetland. There are also isolated stands<br />
further east on the larger hills extending to the main<br />
Cairng<strong>or</strong>ms. Most sites are on N <strong>or</strong> NE-facing slopes<br />
from 200m up to 900m where rain falls in excess of<br />
200 days in a year.<br />
The maj<strong>or</strong>ity of Scotland’s oceanic heath occurs on<br />
moderate to steep slopes with an aspect from NW<br />
through to NE, almost always where there are some<br />
exposed rocks and frequently where the heath has<br />
developed over large block scree. A number of the<br />
lower level sites are quite grassy, with only residual<br />
amounts of heather but such sites probably represent<br />
relicts that were f<strong>or</strong>merly dominated by ericaceous<br />
shrubs and altered by subsequent management.<br />
They usually have frequent Juniper Prongw<strong>or</strong>t<br />
(Herbertus aduncus ssp. hutchinsiae) but only patchy<br />
stands of other species. The higher sites, where<br />
blaeberry is dominant and where Donn’s Notchw<strong>or</strong>t<br />
(Anastrophyllum donnianum) and Alpine Notchw<strong>or</strong>t<br />
(Anastrophyllum alpinum) can occur, are subject<br />
to long periods of snow-lie which may give some<br />
protection from frost.<br />
‘Bryologising’<br />
Although identifying species initially needs a<br />
modicum of determination, it is possible to quite<br />
quickly become familiar with most of the indicat<strong>or</strong><br />
species f<strong>or</strong> Scotland’s oceanic heath. The lower<br />
stands of this community have the virtue of being<br />
available all the year round and grow in really nice<br />
places. Though some of the species are very distinct,<br />
even from some metres away, the process and the<br />
enjoyment will be enhanced if you get used to using<br />
a hand-lens (at least x10) to reveal the finer features<br />
on which identification sometimes depends. In the<br />
descriptions, where a lens is necessary it is indicated<br />
by (lens). Remember, hand-lens to the eye and move<br />
the plant into focus.<br />
In these guides, English names have been used<br />
alongside the Latin; these are not ‘common names’<br />
in the same sense as those f<strong>or</strong> flowers because they<br />
are all recent inventions and as yet are hardly used<br />
except in publications like this! Latin names should<br />
always be used f<strong>or</strong> rec<strong>or</strong>ding purposes to avoid any<br />
ambiguity.<br />
LIVERWORTS<br />
Lindenberg’s Featherw<strong>or</strong>t<br />
(Adelanthus lindenbergianus)<br />
Orkney Notchw<strong>or</strong>t<br />
(Anastrepta <strong>or</strong>cadensis)<br />
Donn’s Notchw<strong>or</strong>t<br />
(Anastrophyllum donnianum)<br />
Alpine Notchw<strong>or</strong>t<br />
(Anastrophyllum alpinum)<br />
Lesser Whipw<strong>or</strong>t<br />
(Bazzania tricrenata)<br />
Arch-leaved Whipw<strong>or</strong>t<br />
(Bazzania pearsonii)<br />
Juniper Prongw<strong>or</strong>t<br />
(Herbertus aduncus ssp. hutchinsiae)<br />
N<strong>or</strong>thern Prongw<strong>or</strong>t<br />
(Herbertus b<strong>or</strong>ealis)<br />
Oceanic, NR, RDL, S8. Leafy liverw<strong>or</strong>t;<br />
size: medium-sized, f<strong>or</strong>ming open turfs of<br />
neat, erect stems amongst other bryophytes;<br />
colour: usually dark brown but can be<br />
brownish-green, glossy; leaves: rounded and<br />
the upper margin incurved towards the stem,<br />
all leaves turned down in the same direction;<br />
habitat: on thin peaty soil amongst heather<br />
on NE-facing slopes; note: superficially<br />
similar to Anastrophyllum donnianum and<br />
Anastrepta <strong>or</strong>cadensis but the incurved<br />
upper leaf margin is unique; currently known<br />
from just one site on Islay.<br />
Wood’s Whipw<strong>or</strong>t<br />
(Mastigoph<strong>or</strong>a woodsii)<br />
Oceanic, NS. Leafy liverw<strong>or</strong>t; size: mediumsized<br />
but often f<strong>or</strong>ming large cushions <strong>or</strong><br />
patches; branching: irregular but frequent,<br />
the branches tending to narrow towards the<br />
end colour: usually some shade of yellow<br />
but may be variegated green <strong>or</strong> brownish;<br />
leaves: two lobes, the upper larger than the<br />
lower but the most noticeable feature is the<br />
margin which has lots of long narrow teeth<br />
(cilia) easily visible with a lens underleaves:<br />
similar in shape to the main leaves but much<br />
smaller; habitat: on thin peaty soil amongst<br />
ericaceous shrubs, in block scree <strong>or</strong> at the<br />
base of crags on N and NE-facing slopes,<br />
also occasionally in heathy woodland and<br />
wooded ravines; note: confusion only possible<br />
with Ciliated Fringew<strong>or</strong>t (Ptilidium ciliare),<br />
a species of drier heaths which has sh<strong>or</strong>ter,<br />
blunt branches.<br />
© Maren Flagmeier<br />
Leafy liverw<strong>or</strong>t; size: medium, usually<br />
growing as an open turf of erect stems<br />
amongst other bryophytes; colour: often a<br />
rather pale green but can be a dull yellow <strong>or</strong><br />
brown, frequently has red gemmae at the<br />
stem apex; leaves: rounded but irregular<br />
and usually shallowly lobed at the apex, the<br />
base of the leaf is concave but the upper part<br />
curves away from the stem so that the whole<br />
looks convex; habitat: on thin peaty soil<br />
amongst ericaceous shrubs, in block scree<br />
<strong>or</strong> at the base of crags on N and NE-facing<br />
slopes, also frequent in heathy woodland and<br />
wooded ravines; note: generally common in<br />
the west and also frequent in this community.<br />
Tayl<strong>or</strong>’s Flapw<strong>or</strong>t (Mylia tayl<strong>or</strong>i)<br />
Leafy liverw<strong>or</strong>t; size: medium to large,<br />
usually in large swelling cushions; colour:<br />
variable, in unshaded places it often purplishred<br />
variegated with yellow and brown, usually<br />
green in shade; leaves: large and round, often<br />
pressed together at the apex and with very<br />
large cells (lens); habitat: on thin peaty soil<br />
amongst ericaceous shrubs, in block scree<br />
<strong>or</strong> at the base of crags on N and NE-facing<br />
slopes, also frequent in heathy woodland and<br />
wooded ravines; note: a handsome liverw<strong>or</strong>t,<br />
generally common in the west and also<br />
frequent in this community.<br />
Oceanic, NS. Leafy liverw<strong>or</strong>t; size:<br />
medium-sized, f<strong>or</strong>ming open turfs of erect<br />
stems amongst other bryophytes; colour:<br />
usually dark brown but can be brownish<br />
green, glossy; leaves: rounded-triangular<br />
but concave so that leaves seem narrow, the<br />
apex has a small notch, all leaves turned<br />
down in the same direction; habitat: on<br />
thin peaty soil amongst ericaceous shrubs,<br />
in block scree <strong>or</strong> at the base of crags on N<br />
and NE-facing slopes; note: the commonest<br />
species of this community at higher<br />
altitudes and locally abundant.<br />
Carrington’s Featherw<strong>or</strong>t<br />
(Plagiochila carringtonii)<br />
Oceanic, NS. Leafy liverw<strong>or</strong>t; size: mediumsized<br />
but often f<strong>or</strong>ming large cushions <strong>or</strong><br />
patches with erect stems; colour: pale <strong>or</strong><br />
yellow-green, often whitish when dry; leaves:<br />
round and placed vertically on the stem so<br />
that the upper faces are pressed against<br />
each other so the shoots look flattened, the<br />
upper margin running down the stem where it<br />
joins (decurrent); habitat: on thin peaty soil<br />
amongst ericaceous shrubs, in block scree<br />
<strong>or</strong> at the base of crags on N and NE-facing<br />
slopes, also occasionally in heathy woodland<br />
and wooded ravines.<br />
Oceanic, NS. Leafy liverw<strong>or</strong>t; size: mediumsized,<br />
f<strong>or</strong>ming open turfs of erect stems<br />
amongst other bryophytes; colour: usually<br />
dark brown but can be brownish green, glossy;<br />
leaves: rounded and very concave, f<strong>or</strong>ming<br />
a cup-shape, the apex has a small notch, all<br />
leaves turned down in the same direction;<br />
habitat: on thin peaty soil amongst ericaceous<br />
shrubs, in block scree <strong>or</strong> at the base of crags on<br />
N and NE-facing slopes; note: almost always<br />
with Donn’s Notchw<strong>or</strong>t (Anastrophyllum<br />
donnianum) but much less common, easily<br />
confused with it but the cup-shaped leaves<br />
are distinctive – if you are not sure, then it is<br />
not Anastrophyllum alpinum. Joergensen’s<br />
Notchw<strong>or</strong>t (Anastrophyllum joergensenii) has<br />
only recently been described as distinct from<br />
Anastrophyllum alpinum and is difficult to<br />
separate from it; it is smaller, usually f<strong>or</strong>ms<br />
denser turfs and may occur in damper sites.<br />
Prickly Featherw<strong>or</strong>t<br />
(Plagiochila spinulosa)<br />
Oceanic. Leafy liverw<strong>or</strong>t; size: mediumsized<br />
but often f<strong>or</strong>ming large cushions <strong>or</strong><br />
extensive pure patches; colour: yellow- <strong>or</strong><br />
mid-green; leaves: rounded but upper<br />
margin rather straight and running down<br />
the stem (decurrent) in a slight curve, apex<br />
and lower margin with spine-like teeth,<br />
aromatic when crushed and inrolled when<br />
dry; habitat: on rocks and trees in shaded<br />
habitats in the west and common in the<br />
oceanic heath community.<br />
Leafy liverw<strong>or</strong>t; size: small but may f<strong>or</strong>m large<br />
cushions <strong>or</strong> straggling patches; branching:<br />
frequent thin branches from bottom of stem<br />
(flagellae) pale with tiny leaves colour: usually<br />
mid-green but can be yellowish; leaves:<br />
rounded-triangular and asymmetric with three<br />
small teeth at the narrow apex, often closely<br />
set and overlapping but sometimes widely<br />
spaced; underleaves: rounded and held close<br />
the stem, usually with teeth visible at the apex<br />
(lens); habitat: on thin peaty soil amongst<br />
ericaceous shrubs, in block scree <strong>or</strong> at the base<br />
of crags on N and NE-facing slopes; note: This<br />
is a widespread species not limited to this<br />
community but frequent in it.<br />
Purple Spoonw<strong>or</strong>t<br />
(Pleurozia purpurea)<br />
Oceanic. Leafy liverw<strong>or</strong>t; size: medium<br />
to large f<strong>or</strong>ming loose turfs <strong>or</strong> straggling<br />
through other bryophytes; colour: usually<br />
a distinctive dark reddish-purple but can be<br />
yellow- <strong>or</strong> brownish-green in shade; leaves:<br />
complex, bilobed with a smaller, almost<br />
tubular, upper lobe over a large concave<br />
lower lobe; habitat: on thin peaty soil<br />
amongst ericaceous shrubs, in block scree<br />
<strong>or</strong> at the base of crags on N and NE-facing<br />
slopes, in wet heath, on blanket bog, also in<br />
heathy woodland and wooded ravines; Note:<br />
Unmistakeable, frequent in this community<br />
but also abundant in wet heath and mires.<br />
Oceanic, NS. Differs from Bazzania<br />
tricrenata in usually f<strong>or</strong>ming denser and<br />
m<strong>or</strong>e ‘succulent-looking’ patches, the base<br />
of the leaves widely crossing the stem when<br />
viewed from above; underleaves held away<br />
from the stem and untoothed.<br />
Western Earw<strong>or</strong>t<br />
(Scapania gracilis)<br />
Oceanic. Leafy liverw<strong>or</strong>t; size: medium<br />
sized but often f<strong>or</strong>ming large cushions <strong>or</strong><br />
extensive pure patches; colour: a rather<br />
dull yellow- <strong>or</strong> brownish-green; leaves: two<br />
lobed but with the upper lobe bent over the<br />
lower and upper part bent back so it stands<br />
up from the stem, margin usually strongly<br />
toothed (lens); habitat: on thin peaty soil<br />
amongst ericaceous shrubs, in block scree,<br />
on acidic rocks and trees; note: a common<br />
western species often present and locally<br />
abundant in stands of Scotland’s oceanic<br />
heath at lower levels.<br />
Oceanic. Leafy liverw<strong>or</strong>t; size: medium-sized<br />
with slender stems but often f<strong>or</strong>ming deep,<br />
dense cushions <strong>or</strong> large straggling patches;<br />
branching: frequent thin branches from<br />
bottom of stem (flagellae) with tiny leaves<br />
colour: usually a distinctive reddish- <strong>or</strong>ange<br />
colour but can be green <strong>or</strong> yellow green tinged<br />
with red; leaves: triangular but deeply divided<br />
into two long, pointed lobes, usually all turned<br />
in the same direction underleaves: similar in<br />
shape and size to the main leaves; habitat:<br />
on thin peaty soil amongst ericaceous shrubs,<br />
in block scree <strong>or</strong> at the base of crags on N and<br />
NE-facing slopes, also in heathy woodland<br />
and wooded ravines; note: confusion is only<br />
possible with the next species <strong>or</strong> with Straw<br />
Prongw<strong>or</strong>t (Herbertus stramineus), another<br />
oceanic species but one which favours m<strong>or</strong>e<br />
base-rich sites.<br />
Cloud Earw<strong>or</strong>t<br />
(Scapania nimbosa)<br />
Oceanic, NS. Leafy liverw<strong>or</strong>t; size: medium<br />
sized, usually in small patches mixed with<br />
other bryophytes and only rarely f<strong>or</strong>ming<br />
large pure patches; colour: usually a purplishred,<br />
rarely reddish-green <strong>or</strong> <strong>or</strong>ange; leaves:<br />
two lobed and the lobes divided almost to<br />
the base, the smaller upper lobe bent flat<br />
over the lower and both lobes tapering to a<br />
rounded apex, margin with long curved teeth<br />
(lens); habitat: on thin peaty soil amongst<br />
ericaceous shrubs, in block scree <strong>or</strong> at the<br />
base of crags on N and NE-facing slopes; note:<br />
easily distinguished from Bird’s-foot Earw<strong>or</strong>t<br />
(Scapania <strong>or</strong>nithopodioides), with which it<br />
usually grows, by the colour and long, curved<br />
teeth on the leaves.<br />
Oceanic, NR, RDL. Distinguished from<br />
Herbertus aduncus ssp. hutchinsiae<br />
by its usually bright <strong>or</strong>ange colour, the<br />
m<strong>or</strong>e regularly curved and asymmetric<br />
leaves, smaller underleaves and by the<br />
numerous flagelliferous branches; note:<br />
currently known only from Beinn Eighe,<br />
its only European site.<br />
Bird’s-foot Earw<strong>or</strong>t<br />
(Scapania <strong>or</strong>nithopodioides)<br />
Oceanic, NS. Leafy liverw<strong>or</strong>t; size:<br />
medium to large, usually in small patches<br />
mixed with other bryophytes and only<br />
rarely f<strong>or</strong>ming large pure patches; colour:<br />
usually a characteristic ‘liver’ red colour;<br />
leaves: two lobed and the lobes divided to<br />
the base, the smaller upper lobe bent flat<br />
over the lower and both lobes tapering to a<br />
rounded apex, margin with straight teeth<br />
(lens); habitat: on thin peaty soil amongst<br />
ericaceous shrubs, in block scree <strong>or</strong> at the<br />
base of crags on N and NE-facing slopes,<br />
also occasionally in heathy woodland and<br />
wooded ravines.