Atlas Of Ferns Of The British Isles
Atlas Of Ferns Of The British Isles
Atlas Of Ferns Of The British Isles
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26.3<br />
POLYSTICHUM<br />
SETIFERUM<br />
Soft Shield-fern<br />
CHANNEL ISLANDS<br />
Kilometres<br />
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26.3 Polystichum setiferum (Forsk.) Woynar<br />
A southern sub-Atlantic species which reaches its northernmost<br />
location in Britain (v.c. 95). Its distribution, whilst to some<br />
extent locally governed by an edaphic requirement of base-poor<br />
soils, indicates an optimum in areas with a warm wet winter. It is<br />
often a hedgerow plant in the south. It may be distinguished by<br />
the basal pinnae which are long, spreading and pinnate. <strong>The</strong><br />
spores are smaller than P.aculeatum(ay. 30.5m) with a winged<br />
perispore (A.Sleep, pers. comm.).<br />
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