76 Ojir Native Ferns. 



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

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

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

 nearly sessile, deltoid, bipinnatifid pinnas ; segments toothed, 

 minutely glandular and everywhere viscid ; teeth of segments re- 

 curved, forming indusia. Cal. IV. 



*** Frond somewhat hairy and glandular not tomentose. 

 ^Fronds deltoid-ovate ; stipes stramineous. 



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

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

 gradually simpler above, every where glandular-puberulent; lowest 

 pair of pinnfe unequally deltoid-ovate, upper ones oblong ; pin- 

 nules short -stalked ; ultimate pinnules divided into minute rounded 

 lobules, strongly revolute when fertile. Tex. V. 



^'^ Fronds ovate-lanceolate ; stipes brownish. 



7. C. vestita,* Swz. Stipes tufted, 2' — 4' long, wiry, chestnut- 

 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. N. Y. to Kan., and south- 

 ward. III. 



8. C. Cooperffi,* D. C. Eaton. Stipes densely tufted, fragile, 

 hairy with straitish nearly white articulated hairs which are usu- 

 ally tipped with a glandular and viscid enlargement ; fronds 3' — 

 8' long, bipinnate, the pinnae rather distant, oblong-ovate ; pin- 

 nules roundish-ovate, crenate and incised, the ends of the lobules 

 forming herbaceous indusia. Cal. IV. 



\ 3. PHYSAPTERIS. Presl. Ultimate segments minute, bead- 

 like; indusium usually continuous all round the margin; fronds 

 (in our species) bi — tripinnate, the lower surface scaly or tom.entose 

 or both. 



* Fronds tomentose beneath, not scaly {except the rachises in 

 No. 12). 



\ Upper surface naked or nearly so. 



9. C. gracillima,* D. C. Eaton. (Lace-fern.) Stipes densely 

 tufted, 2'— 6' long, dark brown ; fronds i'— 4' long, narrowly ovate- 

 lanceolate, bipinnate ; pinnas numerous, crowded, pinnately di- 

 vided into about nine obl.ong-oval pinnules at first slightly webby 

 above, soon smooth, heavily covered beneath with pale-ferrugi- 

 nous matted wool ; indusia yellowish-brown, formed of the con- 

 tinuously curved margin. Cal. and northward. IV. 



