s A Field Guide to the British Seaweeds - NMBAQC
s A Field Guide to the British Seaweeds - NMBAQC
s A Field Guide to the British Seaweeds - NMBAQC
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Polysiphonia fucoides<br />
Plants are generally dark red <strong>to</strong> black in<br />
colour growing up <strong>to</strong> 30cm long and quite<br />
coarse in texture. Branching is irregular<br />
and tends <strong>to</strong> be concentrated <strong>to</strong>wards <strong>the</strong><br />
upper portions of <strong>the</strong> plant often appearing<br />
scraggy. It is a polysiphonous species<br />
consisting of 12-20 siphons with a small<br />
covering of cells occasionally in <strong>the</strong> lower<br />
fronds. It is very common throughout <strong>the</strong><br />
lit<strong>to</strong>ral found in numerous habitats.<br />
Polysiphonia lanosa<br />
P. Lanosa is dark purple <strong>to</strong> black,<br />
filamen<strong>to</strong>us, it can grow up <strong>to</strong> 8cm long<br />
and is often quite coarse . It is a<br />
polysiphonous species consisting of 12-<br />
24 siphons around a prominent central<br />
siphon or cell, with distinct dicho<strong>to</strong>mous<br />
branching often appearing quite tufted.<br />
It only grows epiphytically on<br />
Ascophyllum on <strong>the</strong> upper and mid<br />
lit<strong>to</strong>ral and this is used <strong>to</strong> distinguish it<br />
from o<strong>the</strong>r species of Polysiphonia.<br />
P. fucoides in natural<br />
habitat, its general<br />
morphology and<br />
showing <strong>the</strong> 12<br />
secondary siphons<br />
P. lanosa with dicho<strong>to</strong>mous branching,<br />
growing on Ascophyllum, and showing<br />
numerous siphons with distinct central<br />
siphon