Polypodium Vulgare, Linnaeus. 
COMMON POLYPODY. 
Root — Radicles dark brown, long and fibrous; rhizome 
long and creeping, covered with a scaly cuticle. 
Frond — Linear-lanceolate, deeply pinnatifid. 
Stipes — About one-third the length of the frond, arti¬ 
culated at the base. 
Pinnae — Linear, alternate, serrated more or less deeply 
at the margin, mostly rounded at the apex. 
Venation — Midvein sinuous, lateral veins alternate, three 
or four times branched. 
Fructification — Clusters of capsules circular, on each 
side the midvein: capsules generally on the upper part of 
the frond only. 
Habitat — On old trees, hedges, walls, roofs, and ledges 
of rocks, common. 
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