Ferns of British India and Ceylon. 269 
angularly, with an excurrent veinlet which runs to the margin or joins 
one rarely two pair of the superior veins ; upper surface glabrous, 
under surface generally very hairy ; sori medial on the veins ; indu- 
sium reniform, hairy. R. Br. Prod. Fl. Nov. Holl. 148. Hook. 
Syn. Fil. 289. Polypodium unitum, Linn. Sp. PI. 1548, in part. 
N. propinquum. Hook. Sp. Fil. iv. 79. Bedd. F. S. I. t. 89. 
Throughout the Indian region in swampy places and tanks. 
(Also in Tropical Asia, Africa, Australia and America.) 
3. Nephrodium pteroides. (^Retz. u?ider Polypodium) Rhi- 
zome wide-creeping, stipes up to 2 feet long, slender, slightly scaly 
below ; fronds up to 4 feet or rather more long and 2 feet broad, 
pinnate, pinnae spreading f to nearly i inch broad, apex acuminate, 
(lower ones not reduced), cut down only one-third, the lobes triangular, 
acute ; texture herbaceous ; rachis and upper surface nearly glabrous, 
under surface with minute glandular pubescence on all the veins, 
veins pinnate on the lobes, the lowest pair always anastomosing 
angularly with a free excurrent veinlet, the other veins, (7-9 pair,) 
always free ; sori towards the apex of the upper veinlets always con- 
fined to the lobes or the apex of the lobes. Polypodium pteroides, 
{Retz.), Hook. Syn. Fil. 289. Nephr. terminans. Wall. Cat. 386. 
Hook. Sp. Fil iv. 73. Bedd. F. S. I, t. 90. 
Madras Presidency, Western mountains, 2,000-4,000 feet 
elevation; Ceylon, up to 3,000 feet; Birma; (not in N. India). 
(Also in the Philippines.) 
Very near extensum, but less cut, the anastomosis of the veins 
regular and the sori terminal. 
4. Nephrodium extensum. {Bl.) Rhizome creeping, stipes 
up to 2 feet, glabrous or slightly pubescent ; fronds up to 4 feet long, 
and foot broad, pinnate; pinnae about f inch broad (lower ones 
not reduced), cut down two-thirds into linear oblong-falcate slightly 
crenulate lobes; texture herbaceous ; rachis subglabrous, upper surface 
naked, or with a few distant hairs, under surface with minute glandular 
pubescence on the veins ; veins pinnate in the lobes, 10-13 pair, 
the lowest pair anastomosing at an angle with a free excurrent 
