FILICES. 



stipes dark-brown, glossy, rusty pubescent on the upper side, 

 4' 6' i on g ; fronds 4' 6' long, ovate-lanceolate, bi tripinnate ; 

 pinnae lanceolate, the lowest ones usually largest and more del- 

 toid; pinnules oblong or deltoid-ovate, deeply incised or pin- 

 nate; indusium similar in texture to frond, interrupted or sub- 

 continuous. Florida, New Mexico. 



5. C. Alabamensis Kunze. Rootstock creeping, clothed 

 with slender brown scales; stipes black with scanty ferruginous 

 wool ; fronds 2' 10' lon%, narrowly lanceolate, bipinnate ; pinnae 

 close, ovate-lanceolate, the lowest ones not enlarged, usually 

 smaller than those above ; pinnules mostly acute, often auricu- 

 late on the upper side at the base; indusia pale, membra- 

 nous, interrupted only by the incising of the pinnules. (Pellcra 

 Alabamensis Baker, Pteris Alabamensis Buckley.) Virginia, 

 Alabama, Tennessee to Texas and Arizona (Lemmoii). 



** Segments of the frond glandular viscid. 



6. C. viscida Dav. Stipes 3' 5' long, wiry, blackish, chaffy 

 at the base with narrow ferruginous scales ; fronds 3' 5' long, 

 f i' broad, narrowly oblong, pinnate, with 46 distant 

 pairs of nearly sessile, deltoid, bipinnatifld pinnae; segments 

 toothed, minutely glandular and everywhere viscid; teeth of 

 segment recurved, forming indusia. California. 



*** Fronds somewhat hairy and glandular, not tomentose. 

 t Fronds deltoid-cn>atc; stipes stramineous. 



7. C. leucopoda Link. Stipes 3' 4' long, stout, chaffy at 

 base; fronds 2' 4' long, deltoid-ovate, quadripinnate at base, 

 gradually simpler above, everywhere glandular-puberulent ; 

 lowest pair of pinnae unequally deltoid-ovate, upper ones ob- 

 long; pinnules short-stalked; ultimate pinnules divided into 

 minute rounded lobules, strongly revolute when fertile. Texas. 



ft Fronds ovate-lanceolate; stipes brownish. 



8. C. vestita Swz. Stipes tufted, 2' 4' long, wiry, chest- 

 nut-brown ; fronds 4' 9' long, i' 2' broad, tripinnatifid ; pinnae 

 somewhat distant, lanceolate-deltoid ; segments more or less 

 thickly covered with acute hairs ; sori copious ; indusia formed 

 of the ends of roundish or oblong lobes. (Nephrodium lano- 

 sum Michx.) New York to Kansas and southward to Georgia. 



9. C. Cooperae D.C.Eaton. Stipes densely tufted, fragile, 



