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, 
1-1$ broad, ovate-lanceolate, tripinnate, or bipinnate with crenately pin- 
natifid pinnules [in small northern forms bipinnate only]; pinne 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.  €. 
vestita, Hook. 1. c. in part, not of Swartz. C. lanosa, Eaton in Botany of 
Mex. Boundary, but not Nephrodiwm lanosum, Michx. C. gracilis, Met- 
tenius, iiber Cheil. p. 36. Myriopteris gracilis, Fée, Gen. Fil. p. 150, t. 29, 
fig. 6. 
From Illinois (Vasey), 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 (Brandegee), and New 
Mexico, C. Wright, Nos. 818, 2125. Arizona, Dr. Parry, 1867. Nuttall’s specimens were from Fort Inde- 
pendence, Missouri. A smaller Fern than either of the next two, but 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, Riehl 
(ex Fée g. 150).” But Fée names the plant himself ‘‘ Myriopteris gracilis, F.” (p. 149), and gives as a 
synonym “ Cheilanthes vestita, Riehl non Sw., n. 529”; so that Mettenius is in error in quoting Riehl] as 
originator of the name gracilis. Nuttall’s name having existed, for many years before the publication of 
any of these works, as a manuscript name in so public and accessible a place as Hooker’s 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 Mettenius, and 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- 
