MLICES. 93 



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

 ^'_6' long ; fronds 4'— lo' long, ovate-lanceolate, bi— tripinnate ; 

 pinnie 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 (Buckl.) Kunze. Rootstock creeping, 

 with slender brown scales; stipes black with scanty ferruginous 

 wool ; fronds 2' — 10' long, 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. {Pellcca 

 Alabamensis Baker, Pteris Alabame7isis Buckley.) Virginia, 

 Alabama, Tennessee to Texas and Arizona {Lemmon). 



** Segments of the frond glandiclar viscid. 



6. C. viscida Dav. Slipes 3' — 5' long, wiry, blackish, chafTy 

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

 J' — i' broad, narrowly oblong, pinnate, with 4—6 distant 

 pairs of nearly sessile, deltoid, bipinnatifid 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-oi'atc; stipes stramineous. 



7. C. leucopod^ Link. Stipes 3' — 10' long, stout, chaflfy at 

 base; fronds 2' — 7' 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. 



f\ Fronds ovate-lanceolate ; stipes brownish. 



8. C. lanosa (Michx.) Watt. Stipes tufted, 2' — 4' long, 

 chestnut-brown; fronds 4' — 9' long, l' — 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 

 lanosum Michx. C.vestita Swz.) New York to Kansas and Georgia. 



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



