242 
ATHYRIUM. 
ATHYRIUM SUBTRIANGULARE. (Hook. MSS.) Stipe 8-10 inch long smooth and naked above, elothed below with a 
few large lanceolate brown scales, frond about a foot each way deltoid tripinnatifid, lower pinnæ much the largest 4-6 inches long, 13-2 
inch broad, pinnules oblong-lanceolate cut down nearly to the rachis into numerous close sharply-toothed linear-oblong lobes, texture 
herbaceous, rachises and surfaces naked, veinlets of the segments 4-5 on each side, the lower ones forked, upper sori round, the lower 
ones oblong, sometimes slightly curved—Athyrium crenatum var. 8.— Hook. Sp. Fil. iii. 225. A Hookerianum Moore Allied to the 
Siberian and North European A crenatum (Fries), but much more finely divided and sharply cut, and the sori are almost like those of ۰ 
Cystopteris, 
The specimen figured is from Sikkim—(Dr. Hooker), and represents the two lowest pinnæ : the outline of the whole frond is 
exactly deltoid. | | | 
Hab, Sikkim— Himalaya, 10—12 000 tt, elevation. 
PLATE No. CCXLII. 7 
