28 Ferns of British India and Ceylon. 
TRIBE III.— HYMENOPHYLLEiE. 
Sori terminal or marginal from the apex of a vein; receptacle 
elongated, often filiform an d long, and exserted more or less, clothed 
especially below with sessile orbicular imbricated subpeltate com- 
pressed capsules, surrounded by a complete transverse ring, opening 
vertically ; indusium inferior, various in shape, generally of the 
same texture as the frond. Small, often epiphytal ferns, herbaceo- 
membranaceous, more or less laxly cellular, variously costate and 
veined. Caudex frequently long, creeping, and fihform. 
GENUS XIL— HYMENOPHYLLUM. (Z.) 
{Hymen^ membrane ; phyllon^ leaf) 
Sori marginal, more or less sunk in the frond or exserted, ter- 
'minating a costa or vein ; indusium inferior, more or less deeply 
two-lipped or two-valved, toothed, fringed, or entire ; receptacle 
elongated, columnar, exserted, or included ; capsule mostly orbicu- 
lar, depressed, attached by the centre, furnished with a broad trans- 
verse ring, opening irregularly at the apex. Small, often minute 
ferns, growing on trunks of trees and damp rocks in moist places, 
generally on the mountains ; fronds delicately membranaceous, 
simple or compound, costate, or with simple or branched, never 
N?I4. 
HYMENOrHYLLUM 
PARVIFOLIUM. [Baker.) 
Margin of the frond entire. 
I. Hymenophyllum PARVIFOLIUM. {Baker ^ 
A very tiny species, rhizome slender, creeping, 
tomentose ; stipes about i line long ; frond 
very minute, 2-3 lines long, i line broad, 
linear-oblong, margin entire ; simple or 2-3- 
cleft at the apex, sometimes half-way down, 
furnished only with a central costa and a 
few faint, irregular, free spurious venules, the 
margin not thickened ; sori solitary, terminal^ 
the cuneate base sunk in the frond divided 
