476 MR. C. B. CLARKE ON THE FERNS OF NORTHERN INDIA. 
Farngatt. Aspl. 86; Hk. & Baker, Syn. Fil. 121. Thamnopteris Simonsiana, Bedd. 
Ferns Brit. Ind. t. 248. 
Khasia and Jaintea, alt. 0-4500 feet, common. Chittagong, C. B. Clarke.—Beddome 
also finds it in Malabaria; nor do I doubt that he has got the true plant.— 4. Gre- 
villei, Wall. Cat. 1036; Hk. & Grev. Ic. Fil. t. 228; Thamnopteris Grevillei, Bedd. 
Ferns Brit. Ind. t. 66, a Tavoy plant, somewhat recedes from A. nidus type by its 
strongly spathulate fronds; and 4. pachyphyllum, Kunze in Bot. Zeit. vi. 146, differs in 
its texture and remoter sori. 
Subgenus II. Huasplenium. Veins free, simple or branched. Involucre linear, dehiscing 
along the outer edge, none placed back to back. “Beales from the base of the stipe 
fenestrate by rich-brown transverse cells. 
* Fronds undivided. 
2. A. ENSTFORME, Wall. Cat. 200. Frond linear, entire, tapering very gradually down- 
wards, with hardly any stipe; sori much sloping upwards, ultimately very thick.— 
Hk. & Grev. Ic. Fil. t. 71; Meti. Farngatt. Aspl. 145; Hook. Sp. Fil. iii. 89; Hk. 
& Baker, Syn. Fil. 191. A. stenophyllum, Bedd. Ferns Brit. Ind. t. 147. 
Himalaya; from Gurwhal to Bhotan, alt. 4000-9000 feet; common in Sikkim. 
Varies in size from 3 to 24 in. "Texture thick, margin much reflexed in drying; 
stains the drying-paper a madder-rose, whence known in Herb. as A. tingens, Don, but 
where Don so named it cannot be discovered.—4A. Ceylon plant (var. australis) figured in 
Bedd. Ferns South. Ind. t. 125, is usually referred as a geographical var. to A. ensiforme ; 
it is more definitely narrowed into the stipe, the frond is broader and thinner, the sori 
more patent, less thick when ripe. A similar plant is communicated by Mr. Parish from 
Moulmein.—The American 4. coriaceum, Fée, recedes. a long way by its definite 
stipe, &c. 
3. A. GRIFFITHIANUM, Hook. Sp. Fl. iii. 87. Frond linear, undulate, crenate, narrowed 
very gradually downwards, with hardly any stipe.—Hook. Ic. Pl. t. 928; Mett. 
Farngatt. Aspl.89; Bedd. Ferns Brit. Ind. t. 58; Hk. & Baker, Syn. Fil. 193. 
Sikkim; below Darjeeling, scarce; at 4000 feet alt., W.S. Atkinson. Mishmee, arit 
Khasia; alt. 4000-5000 feet, F. Henderson. 
Length 4-12 in.—A fern collected in the South Malay Peninsula differs by having à 
long stipe. It seems related to A. Griffithianwm, exactly as var. australis to its type 
A. ensiforme. : 
4. A. ALTERNANS, Wall. Cat. 221. Frond narrowly oblong, deeply pinnatifid. —Hook. E 
Sp. Fil. iii, 92, Garden Ferns, t. 38; Bedd. Ferns Brit. Ind. t. 59; Hk. & Baker, ` 
Syn. Fil. 194. A. Dalhousie, Hook. Ie. Pl. t. 105; Mett. Farngatt. Aspl. 147. 
North-west Himalaya, alt. 3000-9000 feet, very common; extending to the west frontier - 
of Kashmir, and eastwards to Sikkim, where it is rare—Distrib. Abyssinia, ——————— 
