TAB. IY. 
Cheilanthes OCHRACEA, Hook. 
Csespitosa, radice fibrosa, stipitibus brevibus squamis oblongis 
obtusis patentibus paleaceis una cum racbi pupureo- 
ebeneis, frondibus submembranaceis lato-lanceolatis sub- 
spithameis pilosulis subtus dense ocbraceis furfuraceis 
pinnatis, pinnis plerisque oppositis lanceolatis obtusis infimis 
subdeltoideis omnibus fere ad rachin profunde pinnatifidis, 
segmentis ovalibus obtusis vix crenulatis ciliatis, involucris 
continuis angustis e margine reflexo formatis, marginibus 
membranaceis crenulatis non ciliatis. 
Cheilanthes ochracea, Hook. Gen. et Spec. Fil. 2. p. 144. 
Allosorus ochraceus, Hook, in Benth. PL Hartweg. p. 55. 
Hab. Moist shady places, at Morelia, Mexico, Hartweg , 
n. 418. 
In this plant the involucre is so narrow, as may almost be 
overlooked, when the genus would be Nothoclilcena ; and 
when more evident, it is so continuous as to justify its being 
referred to Allosorus. I have placed it in Cheilanthes for the 
same reasons as have actuated me in placing Ch. chrysophylla 
(Tab. 1.) there, and on account of its affinity in other re- 
spects with that species. Here this pulverulent substance is 
very dense, of a singularly ochraceous colour, and the fronds 
are of a thinner texture than the last mentioned species; it 
differs further in the villous upper side of the fronds, in the 
ciliated margins, in the very short stipites, and is remarkable 
for the large sgreading blunt chaffy scales which clothe the 
latter. 
Fig. 1 . Lower segment of a pinnule, seen from above. 
f. 2. Fertile pinna, seen from beneath: — magnified. 
