30 Ferns of British India and Ceylon. 
about half way down ; valves rounded entire. Bake7'^ Syn. FiL 
f, 56. Bedd. F. B. I. f. 225. 
Moulntiein. 
2. Hymenophyllum tenellum. {^KJin.) Rhizome wide-creep- 
ing hairy or with fine hair-Uke scales; stipes inch long; 
slender, somewhat hairy, fronds 1-2 inches long, |-i inch broad, 
oblong to deltoid, tripinnatifid, margin entire, main rachis winged, 
more or less furnished beneath with ferruginous hair-like scales ; 
pinnae 4-6 jugate, deltoid, cuneate-truncate at 'the base on the lower 
side, lower pinnules 1-2, cleft at tip with ligulate blunt lobes, \ line 
broad, partial rachises and veins more or less hairy beneath, glabrous 
above ; sori 2-6 to a pinna, terminal in the lobes ; involucre with 
hemispherical lobes, and a cuneate entire immersed base. Baker, 
Syn. Fil. p. SI- polyanthos, Bedd. F. S. I. t. 26"] . H. emer- 
sum, Bakei\ Syn. Fil. \st ed. p. 457. 
Ceylon. (C. P. 3,360.) Differs from any form of polyanthos 
in having the rach'ses and veins hairy beneath. 
3. Hymenophyllum exsertum. (IVal/.) Stipe 1-2^ inches 
long, slender; fronds 2-6 inches long, 1-2 inches broad, lanceolate- 
oblong, ovate or short triangular bipinnatifid ; main rachis winged 
above or throughout, more or less densely clothed with deciduous 
ferruginous hairs ; lower pinnae rhomboidal, lanceolate-acuminate, 
divided more than half way down to the rachis into simple or forked 
linear pinnules, slightly hairy on the principal veins ; sori 2-8 to a 
pinna, terminal or axillary in the segments on both sides, involucre 
divided down nearly to the base ; valves oblong, bluntly denticulate 
at the apex. Book. Syn. Fil. p. 58. Bedd. F S. I. t. 9. 
Himalayas and Khasya Hills, 2,000 to 9,000 feet ; Birma ; all 
the Western Ghats of the Madras Presidency ; Ceylon, central pro- 
vinces. Very common. 
4. Hymenophyllum polyanthos. {Sw.) ^ Stipes 2-3^ inches 
long, wingless or narrowly winged towards the apex; fronds glabrous, 
or nearly so, 2-8 inches long by 1-3 inches broad, not crisped, ovate- 
