FILICES. 85 



much the largest, triangular, bipinnatifid ; 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. NOTHOL^ENA 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. nofhus, spurious, and lana, a cloak, alluding to the 

 rudimentary indusia. Includes 37 species. 



i. EuNOTHOlwENA. Fronds not farinose beneath, scaly, 

 hairy, or tomentose. 



* Fronds simply pinnate. 



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

 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. ferruginea (Desv.) Hook. Rootstock creeping, with 

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

 at first; fronds 8 12' long, ' 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 Fronds silky-hairy above. 



3. N. Parry i 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, " |-" broad. California. 



tf Fronds slightly hispid above. 



