SoME LITERATURE ON NortH AMERICAN FERNS 31 
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: Poyser,W. A. The identity of pee: Ferrissi with a : 
A, alternans. Fern Bull. 19: 33-36. 191i. ee : 
cnmphetins we The oak ang eee ferns. Fern Bull. 19: a 
| Walking ferns. Fem Bull 19: 48, 49. | 
on of Lath Counts, , Renesas e a 
As Cow a 
a Ww. ‘An interesting fi 
29 N a. (ast) 
m Bradleyi D. C- 
