s A Field Guide to the British Seaweeds - NMBAQC

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Heterosiphonia plumosa Fine filamentous, with numerous small branches appearing tufted Found throughout the littoral region within a variety of habitats but mainly rockpools Hildenbrandia rubra Deep red staining on the rock surface Found on various hard substrates and rocks Hypoglossum hypoglossoides Lomentaria articulata Lomentaria clavellosa Mastocarpus stellatus Melobesia membranacea Membranoptera alata Nemalion helminthoides Odonthalia dentata Osmundea hybrida Osmundea pinnatifida Palmaria palmata Phycodrys rubens Phyllophora sp. Plocamium cartilagineum Plumaria plumosa Polyides rotundus Foliose, delicate, branched with distinct midrib from which bladelets arise, pointed, small, narrow fronds Pink, bead like, fleshy and numerously branched Pink, bead like, fleshy and numerously branched in single plane, appearing flat In-rolled gutter-like frond, tough and cartilaginous; variable form Calcareous small spots or stains, microscopic and epiphytic Foliose, delicate, branched with distinct midrib narrow, small, rounded fronds, branching from outer frond Gelatinous, squashy, slippery and elastic with few branches Narrow, slightly foliose but tough frond, regular alternate branching; tooth-like Thick, fleshy, alternate or opposite branching in all planes Thick, fleshy, alternate branching in single plane, appears flattened Tough but fleshy and floppy, divided blade with bladelets Foliose, delicate, resembles thin oak leaf with distinct midrib & veins, serrated edge Blade foliose, thin and leafy with faint midrib & veins, cylindrical stipe Fine, filiform and delicate with comb-like branching, very pink Fine, filamentous, delicate short and long branches not regularly alternate, dark purple or brown Tough, cartilaginous, cylindrical frond, dichotomous branching, disc holdfast Found mainly on the lower shore often with other red in the littoral fringe Found in overhangs and crevices in amongst turf formers on mid and lower shore Found in overhangs and crevices in amongst turf formers on mid and lower shore Grows throughout the littoral on a variety of surfaces easy to confuse with Chondrus Grows epiphytically on a variety of filamentous species Found in overhangs and crevices in amongst turf formers on mid and lower shore Found mainly in the mid littoral on open rock surfaces or in shallow pools on southern/western shores Grows in the lower littoral/sublittoral fringe Found in a variety of habitats on mid and lower shore may be mingled with mats/turfs Found in a variety of habitats on mid and lower shore may be mingled with mats/turfs Grows in the lower littoral/sublittoral fringe and can be very abundant Grows in the lower littoral/sublittoral fringe Grows in the lower littoral/sublittoral fringe Grows in the lower littoral/sublittoral fringe and sometimes mid-littoral pools Found in overhangs and crevices in amongst turf formers on mid and lower shore Found in sandy bottom rockpools usually in mid to lower littoral regions Reduced species list identification guide as required by the Water Framework Directive. 44
Polysiphonia fucoides Polysiphonia lanosa Polysiphonia sp. Porphyra leucosticta Porphyra umbilicalis Ptilota gunneri Rhodomela confervoides Rhodothamniella floridula Filamentous, pink to dark brown/black, Found growing throughout the littoral variously branched region within a variety of habitats Filamentous, coarse black and slightly Found growing on Ascophyllum nodosum tufted only on mid to upper shore Filamentous, dark brown/black, variously Found growing throughout the littoral branched region within a variety of habitats Thin, foliose, unbranched blade, membranous, attached to Fucus sp. Thin, foliose, wide unbranched blade, Grows on Fucus throughout the littoral membranous with central attachment Generally found throughout the littoral Fine, filamentous, very delicate with Found in overhangs and crevices in opposite long and short branches which are amongst turf formers on mid and lower regularly alternate; red in colour shore Firm, cartilaginous, straggly, variously Found on the mid to lower shore usually branched, long with disc holdfast within wide shallow rockpools Fine, filamentous, short tufted, unbranched Found on sand covered rocks as a sand and forming a mat binding species throughout littoral Reduced species list identification guide as required by the Water Framework Directive. 45
Page 1 and 2: A Field Guide to the British Seawee
Page 3 and 4: INTRODUCTION The EU Water Framework
Page 5 and 6: - Turfs of mixed species including
Page 7 and 8: Some species have distinct vertical
Page 9 and 10: Table 1: Field sampling sheet to re
Page 11 and 12: Table 2: Species lists for each of
Page 13 and 14: The varieties of algae forms are br
Page 15 and 16: Special features that need to be co
Page 17 and 18: • Reproductive structures - these
Page 19 and 20: Axial cell • Distal- Towards the
Page 21 and 22: A FIELD KEY TO THE BRITISH SEAWEEDS
Page 23 and 24: Rhodophyta The red algae exhibit a
Page 25 and 26: Group A 1. Plants completely flatte
Page 27 and 28: Phaeophyta Species Group A Plants a
Page 29 and 30: 8. Thallus consisting of a large wi
Page 31 and 32: Group D 1. Plant dichotomously bran
Page 33 and 34: Group A 1. Plant calcareous……
Page 35 and 36: 10. Plant completely flattened ofte
Page 37 and 38: 11. Plant black and wiry with disc-
Page 39 and 40: 3. Plant generally found attached t
Page 41 and 42: Browns Alaria esculenta Ascophyllum
Page 43: Ceramium nodulosum Ceramium shuttle
Page 47 and 48: Blidingia sp. This is a tubular and
Page 49 and 50: Chaetomorpha linum This is an unbra
Page 51 and 52: Chaetomorpha melagonium This is an
Page 53 and 54: Enteromorpha sp. A tubular plant wh
Page 55 and 56: Rhizoclonium tortuosum Plant consis
Page 57 and 58: Sykidion moorei Plant consisting of
Page 59: Ulva lactuca A flat foliose plant t
Page 62 and 63: Ascophyllum nodosum Frond very long
Page 64 and 65: Chordaria flagelliformis Plant ofte
Page 66 and 67: Desmarestia aculeata Frond often qu
Page 68 and 69: Ectocarpus sp. Fine filamentous for
Page 70 and 71: Fucus sp. Plants tough, cartilagino
Page 72 and 73: Laminaria sp. Thick leathery, very
Page 74 and 75: Litosiphon laminariae Epiphytic pla
Page 76 and 77: Pilayella littoralis Fine filamento
Page 78 and 79: Scytosiphon lomentaria Plant charac
Page 80 and 81: Spongonema tomentosum Fine and fila
Page 82 and 83: Ahnfeltia plicata Plant completely
Page 84 and 85: Calcareous encrusters Calcareous en
Page 86 and 87: Ceramium nodulosum This is a highly
Page 88 and 89: Chondrus crispus This species is ca
Page 90 and 91: Cystoclonium purpureum This is a fi
Page 92 and 93: Erythrotrichia carnea This is a sma
Page 94 and 95:
Gelidium sp. Gracilaria gracilis Sp
Page 96 and 97:
Heterosiphonia plumosa Plant filame
Page 98 and 99:
Lomentaria clavellosa This plant is
Page 100 and 101:
Hypoglossum hypoglossoides This spe
Page 102 and 103:
Melobesia membrancea This is a smal
Page 104 and 105:
Osmundea hybrida and Osmundea pinna
Page 106 and 107:
Phyllophora sp. Plant tough, cartil
Page 108 and 109:
Polysiphonia fucoides Plants are ge
Page 110 and 111:
Porphyra species These plants are f
Page 112:
Rhodothamniella floridula This plan
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s A Field Guide to the British Seaweeds - NMBAQC

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