FERNS AND FERN-ALLIES 
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stalks, “imperfectly covered by very delicate hood-shaped in- 
dusia” (Gray). 
1. Spore-bearing lvs. pinnate, the podlike lflts. long and narrow 
2 . O. Struthiopteris 
1. Spore-bearing lvs. twice-pinnate, the parts globular i. O. sensibilis 
1. O. sensibilis Sensitive O. Sensitive fern 
Lvs. scattered, from a creeping rhizome, the lamina as broad as 
long, with a network of veins, deeply divided into wavy-edged 
lflts., 3-5dm. tall. Spore-bearing If. twice-pinnately divided 
bearing inrolled globular bodies containing the sporangia. 
Wet meadows and thickets, common. 
Jones Grove; Violet Hill; Botanic Garden. 
Entire U. S. ; also e. Asia. 
July-Nov. 
2. O. Struthiopteris Ostrich Fern Well-fern 
Lvs, in circular, funnel-shaped groups, pinnately divided into 
many narrow pinnately lobed lflts. ; 4-7dm. tall, 8-12cm.wide. 
Spore-bearing lvs. rising in center of cluster, pinnate, the rolled 
back lflts. long and slender, containing sporangia. Spreading by 
runner-like rhizomes. 
Cult., frequent. 
1217 Fifth Ave. ; Botanic Garden. 
All round n. temp, zone, n. of 40 degrees ; very local. 
Aug-Oct. 
Note: Easily cult., and attractive in appearance. 
Grin nell College, 
Grin nell, Iowa. 
