I From the Bulletin of the Torrby Bo i anilai. Ci.ue, 39: 357-385, /A. 26-29. 16 Au 1912.I 



The genus Struthiopteris and its representatives in North America — IP" 



Jean Broadhurst 

 (with plates 26-29) 



The bases of the pinnae in the species previously described are 

 fully adnate; in the following species the lower pinnae, at least, are 

 distinctly petioled, except possibly in two species. Usually the 

 upper pinnae are more or less adnate or even somewhat decurrent; 

 when they are free throughout, the fact is definitely stated. 



The petioled species, except in 5. Shaferi, rufa, Underwoodiana, 

 and Werckleana, have somewhat cartilaginous margins; the swollen 

 or glandular vein apices usually give a subserrate to serrate char- 

 acter to this margin. When fully revolute, both the serrate and 

 the cartilaginous character might pass unnoticed; extremes with 

 regard to both of these characters are found in the non-revolute 

 forms, S. varians and S. falciformis. In such plants as S. falci- 

 formis the veins could not, of course, be described as "not reach- 

 ing the margin." 



In the non-petioled species the scales are usually confined to 

 the rhizome and the basal part of the stipe. In the following group 

 the basal stipe scales are much more numerous, and similar but 

 smaller ones are found on the rachis and often on the costae- 

 Even the veins of the pinnae may have a delicate araneous covering 

 of minute scales or fibrils. These araneous scales are definitely 

 mentioned when present; the scales of the rachis and costae are 

 not separately described unless they are very numerous or differ 

 greatly from those of the stipe. 



[The Bulletin for July 1912 (39: r 30i-356. pi. 24, 25) was issued 23 Jl 1912.] 

 * For part i see Bull. Torrey Club 39: 257-278. pi. 21, 22. 10 Jl 1912. 



357 



