Cheilanthes. 77 



'^'^ Upper surface decidedly pubescent. 

 XStipes tomentose or smooth. 

 10. C. lanuginosa,* Nutt, Stipes densely tufted, slender, at 

 first clothed with woolly hairs, at length nearly smooth ; fronds 

 1' — ^' long, ovate-lanceolate, tripinnate or tripinnatifid, rarely bi- 

 pinnate; pinnae deltoid below, oblong-ovate above, the lowest 

 distant ; ultimate pinnules minute, the terminal one slightly largest, 

 crowded ; upper surface scantily tomentose, the lower densely 

 matted with whitish-brown, woolly hairs ; indusia narrow formed 

 of the unchanged margin. Rocky Mts., 111. and Wis. south-west- 

 ward to Ariz. V. 



II. C. toraentosa, Link. Stipes tufted, 4' — 6' long, rather stout, 

 covered with pale-brown tomentum ; fronds 8' — 15' long, oblong- 

 lanceolate, everywhere but especially beneath tomentose with 

 slender brownish-white obscurely articulated hairs, tripinnate ; 

 pinnae and pinnules ovate-oblong: ultimate pinnules yi" — iyi" 

 long, the terminal ones twice as large ; indusium pale, membra- 

 nous, continuous. Va., N. C, Tenn., Mo., Tex. III. 



XXStipe and rachises covered with very narrow pale-ferrugi' 

 nous scales. 



12. C. Eatoni,* Baker. Stipes tufted 3' — 8' long, wiry, brown- 

 ish ; fronds 4' — 8' long, oblong-lanceolate, tripinnate ; lower pinnae 

 rather distant, upper crowded, ovate-oblong; ultimate pinnules 

 contiguous Y-i " long, rounded, the terminal ones often twice larger ; 

 upper surface gray-tomentose, under surface with heavy matted 

 ferruginous tomentum ; indusia very narrow hidden by the tomen- 

 tum. Tex., N. Mex., Col., Ariz. V. 



** Fronds covered beneath with imbricated scales, not tomentose. 



13. C. Fendleri,* Hook. Stipes 2' — 5' long, chaffy with mi- 

 nute slender scales; fronds 3' — 4' long, ovate-lanceolate, tripin- 

 nate; scales of primary rachis like those of stipe, those of sec- 

 ondary and ultimate rachises larger, broadly-ovate, entire or 

 nearly so, usually edged with white, imbricated and overlapping 

 the {)i" — J^" broad) sub-globose ultimate segments; these are 

 naked above, and commonly bear at their centre a single broad 

 scale; indusium formed of the much incurved margin. Tex. and 

 Col. to Cal. V. 



14. C. Clevelandii,* D. C. Eaton. Stipes scattered, 2' — 6' long, 

 dark-brown, scaly when young, but at length nearly smooth ; 

 fronds 4' — 6' long, ovate-lanceolate, tripinnate, smooth above, 

 deep fulvous-brown below from the dense covering of closely im- 

 bricated, ciliated scales growing on the ultimate segments as well 



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