Rootstock creeping, scaly. Leaves various. Sporecases 
borne in sori without indusia. 
1 . P. vulgare L. 
Poly pod him julnus altertim? Banist. ; Ray, Hist. 
1926. 
P* vulgare L. Sp. PI. 1085. Eatojt^ Ferns N. 
Am. i: 337. t. 31. ff. 1-3 ; in Gray, Man. 6S0. 
Undej^w. in 111. Fl. 1:32; Nat. Ferns 82 ; in 
Britt. Man. 7. Clute^ Ferns 196. Waters ^Y^xw^ 
79- 
Wall Fi£rn, Polypody. 
Plants 1-2.5 dm. ^^^^^^ ^ leaves deeply pinnatifid ; sori 
large, situated midway betw een the margin and the mid- 
rib. 
In rocky places. 
The rootstocks of this species w^ere used in the art of 
medecine by the ancients: radix in usu . . (Plin. Hist. 
26: 58.). In Scandinavia they are much appreciated by 
the children, who delight in gathering stensoeta, 
6. MARGINARIA Bory. 
Rootstock creeping, scaly. Leaves various, lov/cr face 
densely scaly. Sori marginal, without indusia. 
1. n. polypodioides (L.) PL 1. 
Pillx s. Polyp odium . . Virginiajiiim, Pluk. 
1692. Phyt. t. 289. f. I. 
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