FILICES. 85 



much the largest, triangular, biphinatifitl ; upper pinnae more or 

 less pinnately lobed ; lower surface coated with yellow or white 

 powder, finally more or less obscured by the fruit. Arizona, 

 California, and northward. 



IV. NOTHOLv^NA R. Br. Cloak fern. 



Sori marginal, at first roundish or oblong, soon confluent 

 into a narrow band, without indusium, but sometimes covered 

 at first by the inflexed edge of the frond. Veins free. Name 

 from Lat. not/ins, spurious, and Icrna, a cloak, alluding to the 

 rudimentary indusia. Includes 37 species. 



§ I. EuNOTHOL^NA. Frotids not farinose beneath, scaly, 

 hairy, or tomentose. 



* Fronds simply pinnate. 



1. N. sinuata (Swz.) Kaulf. Rootstock short, very chaflfy ; 

 stipes 2' — 4' long, erect; fronds 6' — 2° long, i' — 2' broad ; pinnae 

 numerous, short-stalked, roundish or ovate, entire to pinnately 

 lobed, lower surface densely scaly. Texas to Arizona. 



2. N. ferrug-inea (Desv.) Hook. Rootstock creeping, with 

 dark rigid scales ; stipes tufted, 2'— 4' long, wiry, blackish, woolly 

 at first; fronds 8— 12' long, i' — i' broad, narrowly lanceolate; 

 pinnae numerous, ovate, pinnatifid, hairy above, densely tomen- 

 tose beneath, the wool at first whitish, but becoming ferruginous. 

 {N. rufa Presl.) Texas to Arizona. 



** Fronds bi — quadripinnate. 

 t Frotids silky-hairy above. 



3. N. Parryi D. C. Eaton. Rootstock short, scaly; stipes 

 2' — 4' long, dark brown, pubescent with whitish jointed hairs; 

 fronds 2' — 4' long, oblong-lanceolate, tripinnate, lower pinnae 

 distinct; segments crowded, roundish-obovate, one line broad, 

 densely covered above with entangled white hairs, beneath with 

 a heavier pale-brown tomentum. Utah, California, Arizona. 



4. N. Newberryi D.C. Eaton. (COTTON-FERN.) Rootstock 

 with very narrow dark bristly scales; stipes tufted, 3'— 5' long, 

 blackish-brown, woolly when young, with pale-ferruginous to- 

 mentum ; fronds 3'— 5' long, lanceolate-oblong, covered most 

 densely beneath with fine whitish hairs, tri— quadripinnate ; 

 ultimate segments roundish-obovate, i" — f broad. California, 



+t Fronds slightly hispid above. 



