34 Ferns of British India and Ceylon. 
Mr. Clarke seems to doubt the Sikkim locality, but my speci- 
mens received from Dr. Jerdon quite agree with the type. 
Margin of the frond serrulate. 
7. Hymenophyllum Simonsianum. {Hook) Stipe slender, 
wiry or winged, naked or with a few ferruginous hairs, 1-2 inches 
long ; fronds linear-oblong, 2-6 inches long, up to \\ inch broad, 
l)innatifid to the winged rachis ; the primary segments fan-shaped, 
1-6 lobate, ultimate segments broadly oblong, serrulate; sori 1-4 
terminal on the divisions of the upper pinnae, involucre broadly oblong, 
divided nearly to the base ; valves serrulate. Hook. Syn, Fil. p. 68. 
Bedd. K B. I. t. 281. 
Sikkim, 4,000-10,000 ; common. Khasya Hills. 
8. Hymenophyllum Smithil {Hook.) Stipe 1-2 inches long, 
wiry naked or slightly tomentose ; fronds oblong-acuminate, 3-8 
inches long, 2-3 inches broad, bipinnatifid ; rachis winged above, 
cihated below ; pinn^ oblong- triangular, with a winged rachis and 
simple or 1-4 times forked linear-serrulate segments ; sori 1-4 ter- 
minal on the segments of the pinnae on both sides ; involucre oblong, 
small, divided half down ; valves entire. Hook. Syn. Fil. p. 69. 
Bedd, F. B. I. t. 277. 
Malacca and Penang. 
(Also in Philippines and Java.) 
9. Hymenophyllum denticulatum. {Sw) Stipe 1-2 
inches long, erect, ferruginously hairy or naked, often winged towards 
the apex ; rachis winged throughout ; fronds 2-3 inches long by i or 
more broad at the base, ovate to narrowly oblong, glabrous, or with 
scattered hairs, slightly crisped, pinnatifid to the rachis ; primary 
segments pinnatifid, secondary ones oblong, sometimes again divided, 
serrulate on the margin, involucre ovate, glabrous or scabrous, or 
rarely slightly hairy ; valves serrulate, or pectinate. Swartz, Syn. 
Fil. t. 148 and i^^. Hook. Syn. Fil. p. 70. Bedd. F. B. / /. 278. 
Clarke., Ferns of North India ^ p 438. 
