Ferns of British India and Ceylon. 



95 



being present, but very sparse ; the difference between the two is 

 only a question of the tomentum, and both may well be varieties of 

 farinosa. 



Khasya, 4,000 feet, plentiful on limestone ; Sikkim, 5,000 feet ; 

 Gurwhal, 2,000-4,000 feet; Dalhousie. 



12. Cheilanthes argentea. (Kunze.) 

 3-6 inches long, thick, dark brown, 

 polished, clothed at the very base with 

 linear scales ; fronds 3-4 inches long 

 by 2 inches broad, triangular or deltoid, 

 tripinnatifid, lowest pinnae much the 

 largest but not cut down to the rachis, 

 tripinnatifid ; rachis and costa polished 

 like the stipe, upper surface naked, 

 green, lower covered with white powder; 

 involucres crenate or fimbriate. Kunze. 

 Linnaa, 1S50, p. 242. Hook. Syn. Fil. 

 p. 142. Bedd. F. B. I. t. 143. (The 

 lowest pair of pinnae is rarely almosc 

 quite free, the decurrent wing on the 

 rachis from the next pair being very 

 narrow; the pinnae are generally broadly 

 decurrent, so that the frond is not cut 

 down nearly to the rachis.) 



Birma ; Khasya, 3,000-5,000 feet. 



(Also in Siberia, Japan, and China.) 



Stipes densely tufted, 



£ 



N°4-8. 

 CHEILANTHES ARGEN1 

 {Ktinze.) 



GENUS XXV.— ONYCHIUM. (Kaulf.) 



(Onychion, a little nail; resemblance to the fertile segments of 

 the frond.) 



Sori placed upon a continuous linear receptacle, which connects 

 the apices of several veins ; indusium parallel with the margin of the 

 segments, linear, opposite, pressed down over the sori, the edge 



