36 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



1. Rhizomes slender, creeping, often widely so, or if condensed the branches 

 elongate (7). 

 7. Blades devoid of scales (8) . 



8. Segments round to obovate, beadlike, glabrous above, beneath (together 

 with rachises) densely clothed with long ferruginous hairs; indusium 

 membranous, very broad, covering most of the segment. 



7. C. LENDIGERA. 



8. Segments elongate, not beadlike, glabrous throughout; indusium firm, 

 narrow (9). 

 9. Stipe and rachises black, terete, shining; sori subcontinuous, the indusium 



linear 8. C. alabamensis. 



9. Stipe and rachises light brown, with a broad deep ventral groove, dull; 

 sori distinct, at end of ultimate lobes, the indusia short. 



9. C. WRIGHTII. 

 7. Blades copiously paleaceous, at least upon the rachises (10). 



10. Pinnae closely canescent-tomentulose above, the hairs persistent, en- 

 tangling the segments 10. C. lindheimeki. 



10. Pinnae glabrous (11). 



11. Scales of blade invariably long-ciliate, widely imbricate, wholly cover- 

 ing or exceeding the segments (12). 

 12. Rhizome scales persistent, narrow, attenuate, rigid, dark brown, 

 strongly sclerotic; scales of blade lightly attached above the sinus 

 of the deeply cordate base, the lobes overlapping. 



11. C. COVILLEI. 



12. Rhizome scales deciduous, relatively broad, acuminate, membran- 



ous, usually pale brown, never strongly sclerotic; scales of blade 

 firmly attached at the subcordate or cordate base. 



12. C. WOOTONI. 

 11. Scales of blade slightly sinuate-denticulate, nonciliate, loosely imbri- 

 cate or spreading (13). 



13. Blades mostly oblong-lanceolate; scales large, firm, straight, borne 



on all the vascular parts and nearly covering the segments; leaf 



tissue coriaceous 13. C. fendleri. 



13. Blades roundish-ovate or deltoid; scales much smaller, very delicate, 

 lax, flexuous, borne only on the rachises, not at all concealing the 

 pinnules; leaf tissue membrano-herbaceous 14. C. pringlei. 



1. Cheilanthes pyramidalis Fee, Mem. Foug. 7: 38. 1857. 



A highly variable species, widely distributed in Mexico and Central 

 America, represented in the United States by var. arizonica (Maxon) 

 Broun, confined to the Huachuca Mountains, Cochise County (Lem- 

 mon in 1882, Goodding 760, 1327, type), rich, moist soil, slopes and 

 canyons. 



2. Cheilanthes feei Moore, Ind. Fil. xxxviii. 1857. 



Myriopteris gracilis Fee, Gen. Fil. 150. 1852. 

 Cheilanthes gracilis Mett., Abhandl. Senckenb. Naturf. Gesell. 

 3: 80. 1859. Not Kaulf., 1824. 



Almost throughout the State, 2,000 to 7,000 feet, on dry rocky 

 slopes and cliffs. Illinois and southern Minnesota to British Colum- 

 bia, south to the Mexican border region from Texas to southern 

 California. 



3. Cheilanthes villosa Davenp., Cat. Davenport Herbarium Sup. 45. 



1883. 



Sierra Estrella (Maricopa County), Mule and Huachuca Mountains 

 (Cochise County), Santa Catalina and Santa Rita Mountains (Pima 

 County) ; granitic or limestone slopes and ledges. Western Texas to 

 Arizona and northern Mexico. 



