314 BOTANY. 



■+— •- Upper surface decidedly pubescent; frond thrice pinnate in well-devel- 

 oped plants. 



Cheilanthes lanuginosa, Nuttall. 



Stalks densely tufted, slender, blackish or brown, at first clothed with 

 spreading woolly hairs, at length nearly smooth ; fronds 2-4 inches long, 

 l-l £ broad, ovate-lanceolate, tripinnate, or bipinnate with crenately pin- 

 natifid pinnules [in small northern forms bipinnate only] ; pinnae from del- 

 toid below passing to oblong-ovate above, the lowest distant, the others 

 contiguous ; ultimate pinnules minute, not more than £ a line long and 

 broad, or the terminal one slightly longer and more obovate, all very much 

 crowded ; upper surface scantily tomentose, lower surface densely matted 

 with soft whitish-brown distinctly articulated flattened woolly hairs ; invo- 

 lucres very narrow, formed of the unchanged herbaceous margin of the 

 segments. — Nuttall, MS. in Herb. Hook., and Sp. Fil. ii, p. 99 ; D. C. Eaton 

 in addenda to Gray's Manual, edition of 1863 ; Baker, Syn. Fil. p. 139. C. 

 vestita, Hook. 1. c. in part, not of Swartz. C. lanosa, Eaton in Botany of 

 Mex. Boundary, but not Nephrodium lanosum, Michx. C. gracilis, Met- 

 tenius, fiber Cheil. p. 36. Myriopteris gracilis, Fe*e, Gen. Fil. p. 150, t. 29, 

 fig. 6. 



From Illiuois (Fasey), Wisconsin (Hale), and at the eastern base of the Rocky Mountains in Brit- 

 ish America, near lat. 51° (Bourgeau), to Utah (Watson, Parry, Palmer), Colorado (Brandcgee), and New 

 Mexico, C. Wright, Nos. 818, 2125. Arizona, Dr. Parry, 1867. Nuttall's specimens were from Fort Inde- 

 pendence, Missouri. A smaller Fein than either of the nest two, hut closely related to both. From C. 

 tomentosa it differs by its much smaller proportions, and by the rounded, contiguous segments, which in 

 the latter are more obovate, and are separated from each other by about half their own diameter. 

 From C.Eatoni, the absence of narrow chaffy scales from the stalks and rachis, and the slenderer habit, 

 distinguish it readily. As to the name, I may remark that Mettenius gives it thus: " Ch. gracilis, Kiehl 

 (ex Fee g. 150)." But Fee names the plant himself "Myriopteris gracilis, F." (p. 149), and gives as a 

 synonym " Cheilanthes vestita, Riehl non Sw., u. 529"; so that Mettenius is in error in quoting Kiehl as 

 originator of the name gracilis. Nuttall's name having existed, for many years before the publication of 

 auy of these works, as a manuscript name in so public aud accessible a place as Hooker'* herbarium, and 

 having been published by Hooker in 1851 as a synonym to C. vestita, not the true C. vestita however, I 

 think it proper to retain it now, although I am aware that some writers prefer the name C. gracilis. They 

 ought, however, to accredit this name to Metteuius, aud not to Riehl. 



Cheilanthes tomentosa, Link. 



Rootstock short, branching ; stalks tufted, 4-6 inches long, rather stout, 

 deep chestnut-brown, covered with pale-brown woolly tomentum; frond 

 8-15 inches long, oblong-lanceolate, everywhere but especially beneath 

 tomentose with slender brownish-white obscurely articulated hairs, tripin- 



