5. POLYPODIUM Theophrastus. 
Polypodium a vocibus Graecis rolv multum & rnovs 
- Pes, guast diceretur planta multipes, ob radicum 
Sormam. Tournefort, 1700. Inst. 541. 
Rootstock creeping, scaly. Leaves various. Spore- 
cases borne in sori without indusia. : 
1. P. virginianum L. 
Polypodium minus alterum? Banister ; Ray, Hist. 
2: 1926. 1688. 
P. virginianum L. Sp. Pl. 1085. (excl. syn.) 
P. vulgare auct.non Z. H#aton, Ferns N. A. 1: 
237. t. 31. ff. 1--3; in Gray Man. 680. Uxderw. 
in Ill. Fl 1:32; Nat. Ferns 82; in Britt. Man. 
7. Clute, Ferns 196. Waters, Ferns 77. 
WALLFEeErRN, Porypopy. 
Plants '1-2.5 dm. high; leaves deeply pinnatifid; sori 
large, situated midway between the margin and the 
midrib. 
In rocky places. 
In its outward appearance this species differs in no 
appreciable degree from P. vulgare. The latter species 
is characterized by having from 3 to 5 stedaz at the base 
of the petiole, while in our plant the number is com- 
monly 2, and in older leaves 3, -2 being normal and 1 
is smaller. 
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