Baden-Württemberg - Lichens of Wales

9 Ap. at the ends of the lobes, not sitting up, but
“lengthening” the lobes, undersides free . 10
9* Ap. not at the lobe ends or ap. lacking . 11
10 Ap. on the upper side of usually ascending lobes,
flat or saddle-form. Underside with coarse,
branching and reticulate veins as well as with
clustered rhizines or scattered long single
rhizines, rarely uniformly felty .
Peltigera (II/23)
10* Ap. on the underside of the lobes, but often
bending back toward to top, not saddle-form.
Underside without such veins, bald or velvety,
with cortex . Nephroma (II/23)
11 Underside of the usually large, broad lobed
thallus with coarse, branched and reticulate veins
as well as with clustered rhizines, without cortex,
rarely only uniformly felty. Thallus relatively
coarse . Peltigera
11* Underside without such veins . 12
12 Thallus underside at least in places densely
(standing) short hairy (hand lens), (underside)
beige, brownish, gray-brown, or brown, rarely
black-brown. Relatively large lobed, rare lichens
in very humid habitats, lobes easily detached, not
growing attached to the surface. 13
12* Underside bald and ± smooth or at best uniformly
felty-rough or extensively attached by the surface
. 15
13 Underside with numerous regularly rounded,
sharply bordered, as though punched out pits,
(almost) penetrating the dense short hairs. Upper
side dark brown to brown-gray or gray, with
isidia or soralia . Sticta
13* Underside without such pits . 14
14 Thallus yellowish-gray, blue-gray when moist,
with flat depressions (pits), with at first rounded
blue-gray soralia, undersides light brown, only
occasionally densely short hairy. Lobes very
broad, rounded Lobaria scrobiculata
14* Thallus light to dark brown, brown-gray (to
almost gray), when moist usually dark gray to
blackish . Nephroma
15 Thallus brown, usually dusty dark green when
moist. Underside (except the margins) largely
black-brown to black, felty, without cortex.
Thallus coarse and rigid, with broad lobes
ascending at the margins. Ap. rare, on the upper
side of the lobe ends. Medulla white. In thin turf
and sparse brushy sites . Peltigera
15* With other characteristics. If thallus undersides
black-brown to black, then lobes with a lower
cortex, not coarse and not on such habitats 16
16 With apothecia . 17
16* Without apothecia . 18
17 Thallus small lobed and dissected, brown,
underside light, only with isolated dark rhizines
at the base of the lobes. Lobes ± isidiate or
nodular at the margin, 1-2 mm wide. Ap. brown,
-2 mm, narrowly protruding, with proper margin.
Sp. 2(3)-celled, 11-23(32) x 4.5-7(8.5) µm
Massalongia carnosa
17* Thallus commonly rosetted, barely lobed to
deeply divided, bluish-gray, rarely somewhat
brown tinged, sometimes pruinose, undersides ±
whitish or (blue) gray, decumbent, attached by
the medulla hyphae, often with a dark prothallus.
Ap. reddish to red-brown, with a proper or
thalloid margin. Sp. 1-celled, 7-10 µm wide
GS Pannaria
18 Thallus blue-gray, ± rosetted, -3 cm, at the
margins provided ± densely with granular to
squamulose (to coraloid) isidia, marginal region
pruinose. Lichens of strongly oceanic regions
Pannaria conoplea
18* Thallus not blue-gray, not pruinose 19
19 Lobes ± isidiate or nodular at the margins, 1-2
mm wide. Thallus small lobed and dissected,
brown, underside light, with isolated dark
rhizines only at the base of the lobes. Over
silicate, more rarely on soil mosses
Massalongia carnosa
19* Lobes as a rule wider, smooth at the margins or
crenate or with small lobe, with or without
soralia. Thallus brown, red-brown, rarely gray,
underside beige to brown-black, without rhizines.
On bark, mosses or silicate rock
Nephroma
20 Thallus with scattered, necklace-form Nostocalgae
. 5
20* Thallus not with scattered, necklace-form Nostocalgae
(if with Nostoc, then in dense coils) 21
21 Thallus on bark and bark mosses, small
squamulose to somewhat lobed, often upon a
blue-gray to blackish prothallus. GS Pannaria
21* Thallus not upon bark and bark mosses . 22
22 On peat or soil mosses, and plant remains . 23
22* On rock . 28
23 Thallus purely crustose, thin, coherent, light gray,
slimy-gelatinous when moist, yet with green
algae. With perithecia, sp. muriform. In high
mountains on acid soils
Protothelenella sphinctr.
23* Thallus granular to squamulose. Fruiting bodies
are ap., sp. 1-celled, very rarely 2-celled 24
24 Thallus granular to finely coraloid . 25
24* Thallus small squamulose to nearly lobed . 27
25 Ap. convex, without margin, red-brown. Thallus
finely granular to finely coraloid, olive to gray
brown. .. GS Pannaria: Moelleropsis
25* Ap. flat (to concave) or clearly margined, with
granular thalloid margin or sunken into the
thallus. Thallus granular . 26
26 Thallus blackish (green). Ap. sunken, red-brown,
flat to concave, -2 mm. Sp. 15-27 x 6.5-10 µm
Heppia
26* Thallus light to dark blue-gray. Ap. sessile to
sunken, red-brown to brown, flat to convex, -1
mm. Sp. 11-15(20) x 6-8 µm .
GS Pannaria: Moelleropsis
44