Tas. 4765. 
CHEILANTHES rarinosa. 
Mealy Cheilanthes. 
Nat. Ord. Frtices.—CryrroGamia FIuiczs. 
Gen. Char. Sori subglobosi, marginales, plerumque dente vel lobulo demum 
reflexo frondis marginis siti. Znvolucrum primum plerumque punctiforme, semi- 
orbiculare v. reniforme v. oblongum, e dente v. lobulo textura fere frondis for- 
matum, v. membranaceum et diaphanum, integrum, fimbriatum v. ciliatum, 
magis minusve confluens, non raro continuum: nune rarius subintramarginale.— 
Filices ¢ropice vel extratropice, plerumque parve, rhizomatose, vel radice cespitosa. 
Frondes cespitose, glabra vel pilose, lanuginose vel squamose, raro simpliciter 
pinnate, plerumque bi-tripinnate vel varie pinnatifide. Pinnule lacinieve parece. 
Stipites rachidesque plerumque ebence. Venule furcate, libere, apicibus uni- 
sorosis. 
CHEILANTHES farinosa; radice cespitosa, stipitibus elongatis ebeneis inferne 
squamosis, frondibus subcoriaceis spithameis et ultra deltoideo-ovatis lan- 
ceolatisve glabris pinnatis apice acuminatis pinnatifidis subtus albo-pulve- 
rulentis, pinnis sessilibus inferioribus subsemideltoideis basi bipinnatifidis, 
involucris suborbicularibus scariosis non raro confluentibus undulato-lobatis 
marginibus integris v. erosis. 
CHEILANTHES farinosa. Kaulf. Enum. Fil. p. 212. Hook. et Grev. Ic. Fil. t. 134. 
Hook. Gen. et Sp. Fil. v. 2. p. 17. 
Prerts farinosa. Forsk. Fl. Aiyypt. Arab. p.187. Vahl, Symb. v.3.t. 75. Sw. 
Syn. Fil. p. 105. 
CuErLantuEs dealbata. Don, Prodr. Fl. Nep. p. 16. Wall. Cat. n. 71 (excl. 
sub num. 4). Schimp. in Herb. It. Abyss. n. 1123. Kunze in Linnea, 
v. 24. p. 271. 
Prerts argyrophylla. Sw. Syn. Fil. p. 105. 
Prerts argentea. Bory. \ 
Prerts decursiva. Forsk. et Sw. 
CassnBrERa farinosa. J. Sm. Cat. of Ferns in Kew Gard. Comp. Bot. Mag. 1846, 
p. 20. 
AruritopTeris farinosa. Fée, Gen. Fil. p. 153. t. xii. B. f. 1. (sori distinct.) 
ALEURITOPTERIS dealbata. Fée, Gen. Fil. 1. c. f. 2. (sort confluent.) 
An extremely pretty Fern, with glossy ebeneous stipites and 
rachises, dark green above, clothed beneath with a pure white 
and powdery substance. It is a native of Arabia, Abyssinia, of 
_ FEBRUARY Ist, 1854. os 
