536 MR. €. B. CLARKE ON THE FERNS OF NORTHERN INDIA. 
Khasia, Chittagong; nowhere very common.—Distrib. Burma, Malaya, China, Poly- 
nesia, North Australia. 
Veinlets beneath (and sometimes the surface) with minute golden hairs; but these 
seem often wanting in the Polynesian and Malay examples. Polypodium (Dictyopteris) 
macrodon, Reinw.; Hk. & Baker, Syn. Fil. 318, closely resembles N. Leuzeanwm ; the. 
sori are smaller, more scattered, without golden hairs. 
44. N. ARTINEXUM, C. B. Clarke. Frond 28 by 12in., narrowed at the base to distant 
auricles, softly shortly villous, 1-pinnate; pinnz cut down to a narrow wing into 
narrow segments 1-1} in. long, often pinnatifid upwards; involucres villous; sori 
near the midrib of the pinne or the margin of the segments. —Pleocnemia Clarkei, 
Bedd. Ferns Brit. Ind. Suppl. p. 15, t. 368, not Nephrodium Clarkei, Baker. 
Sikkim, alt. 4500 feet, once collected; on the path descending south from Dikeeling, 
C. B. Clarke. 
Subgenus IV. Sagenic. Frond 1-2-pinnate. Veinlets inarching freely, at least in the 
= barren parts of the frond, with free veinlets often included within the arches; 
veinlets in the ultimate lobes often forked or pinnate. 
* Sori in more than two rows between the principal nerves, often irregularly scattered. 
45. N. vastum, Hk. & Baker, Syn. Fil. 296. Stipes scattered, with numerous. linear- 
subulate brown persistent scales, winged at least upwards; frond 2—4 feet, sub- 
l-pinnate; pinns.6-8 by 2 in., subentire, caudate, lowest pair often furcate ; 
anastomosing veins very numerous, with many included terminating veinlets. 
—Aspidium vastum, Blume, Enum. Pl. Jav. Fil. 142; Mett Fil. Hort. Lips. t. 22. 
fig. 7. A. alatum, Wall. Cat. 378; Hk. & Grev. Ic. Fil. t. 184; Mett Farngatt. 
Pheg. & Asp. 123, t. 18. fig. 1; Hook. Sp. Fil iv. 47. Sagenia alata, Bedd. Ferns 
Brit. Ind. t. 169. 
d Bengal, alt. 0-1000 feet; Mishmee, Khasia, Chittagong.—Distrib. Burma, 
Malaya. ee 
Involueres mostly nephrodioid. Polypodium. dilatatum, Wall., much confounded with 
this, has (inter alia) the stipe without scales. 
46. N. SUBCONFLUENS, C. B. Clarke. Stipes tufted, 1-2 feet long, with linear-subulate 
dark brown persistent scales; frond 6-12 in., triangular in outline, tripartite, 
terminal pinna deeply pinnatifid; lobes 3-6 in., pinnatifid 1 the way down to the 
midrib; lateral pinne ovate, auriculate, sub-2-pinnatifid, more developed on the 
lower side; surface glabrous above, rusty puberulo-pubescent on the veins beneath. 
—Aspidium subconfluens, Bedd. Ferns Brit. Ind. Suppl. p. 14, t. 364. 
Khasia, alt. 3000—3500 feet; below Umwai, C. B. Clarke. 
Said by Col. Beddome ( c.) to have been obtained by Major Heudeman- i in the 
Himalaya; but.Major Henderson tells me that he never colleeted the plant, and I 
doubt its being Himalayan. The sori are very variable in position : : sometimes they are 
nearly inggo regular rows on either side the main nerves; e m eti ne: Ze, are in a 
