Maxon — Lip-ferns Related to Cheilanthes myriophylla. 143 



linear-oblong or narrowly oblong-lanceolate, acuminate, 6-23 cm. long, 

 2-5 cm. broad, tripinnate, the larger tertiary segments ternately (rarely 

 pinnately) divided; rachia similar to the stipe, copiously paleaceous; 

 pinnae numerous, mostly alternate, adjacent (or several lower pairs dis- 

 tant), ascending, upwardly falcate and involute in drying, mostly del. 

 toid-oblong, the lower and especially the basal ones rather broadly 

 deltoid and strongly inequilateral ; secondary and tertiary rachises copi- 

 ously paleaceous beneath, the scales very large, nearly covering the 

 pinnae, whitish or pale tawny with a darker base, ovate, acuminate to long- 

 acuminate, attached at the cordate base (the sinus commonly closed, with 

 overlapping lobes), erose-denticulate, translucent, the cells very irregu- 

 lar, with deeply sinuous partition walls; tertiary segments simple and 

 spatulate to cuneate-obvate, or the larger ones mostly divided into 3 seg- 

 ments, the terminal one larger and more strongly cuneate; ultimate 

 segments in general minute, beadlike, close, glabrous beneath, rather 

 densely villous above, the hairs very coarse, flattish, curved and some- 

 what rlexuous, tortuous, yellowish-hyaline, distantly and obscurely sep- 

 tate; sporangia few, borne within the deeply recurved or cucullate, bilobed 

 border of the segment above the cuneate base, the slightly modified mar- 

 gin a little thinner and paler. Leaf tissue grayish green, herbaceous, 

 minutely papillose, wrinkled in drying. 



This rare and sttongly marked plant was first brought to notice by 

 Davenport, who recognized its relationship to C. myriophylla and 

 regarded it as a " provisional new species," basing his exceedingly brief 

 and rather misleading description upon specimens collected in south- 

 eastern Arizona by Lemmon in September, 1881. Through the kindness 

 of Mr. William P. Rich, Custodian of the Davenport Herbarium of the 

 Massachusetts Horticultural Society, the writer has been able to exam- 

 ine a portion of the type specimen. This agrees closely in all particu- 

 lars with specimens collected on limestone ledges in the Santa Rita 

 Mountains of Arizona, by C. G. Pringle, May 14, 1884, and widely dis- 

 tributed among herbaria as "Cheilanthes myriophylla Desv. (True!)." 

 The agreement is, in fact, so complete that for all practical purposes 

 die latter, generally available collection may be regarded as equiva- 

 pant to the type. 



In its stout, ascending or decumbent rhizome, very long, slender, 

 strongly sclerotic rhizome scales, and conspicuously villous upper leaf 

 surfaces C. villosa differs markedly from C. Fendleri and C. Wootoni, 

 and, except for the sclerotic character of its more elongate rhizome 

 scales, equally from C. Covillei. In most respects it is much nearer C. 

 myriophylla, but from that it differs strongly in the points stated in 

 the key. 



The following specimens of Cheilanthes villosa are in the National 

 Herbarium. 



Arizona: Conservatory Canyon, Huachuca Mountains, Aug., 1882, 

 Lemmon; Santa Rita Mountains, on limestone ledges, May 14, 1884, 

 Pringle (labelled C. myriophylla, "True! " 4 sheets). 



New Mexico: Hanover Mountain, Grant County, Aug. 9, 1911, 



