444 MR. C. B. CLARKE ON THE FERNS OF NORTHERN INDIA. 
This belongs to the section Pseudocystopteris. The involucres are sometimes across a 
vein, very often at the bifurcation of a vein, very rarely subterminal on a vein. 
7. D. PULCHRA, Don, Prodr. Fl. Nep. 11. Scales of the rhizome adpressed, obtuse, often 
peltately attached ; ultimate segments of the leaves small, lanceolate, not distant, 
often not very acute; involucre prominent; sorus usually about as broad as its 
Segment D. cherophylia, Wall. Cat. 259; Hook. Sp. Fil. i. 157, t. 514; Hk. & 
Baker, Syn. Fil. 92. Cystopteris squamata, Dene. in Jaequem. Voy. Bot. 178. 
Acrophorus pulcher, Bedd. Ferns South. Ind. t. 10. 
Himalaya ; from Nepaul to Bhotan, alt. 2000-9000 feet, abundant. Khasia; alt. 3000- 
6000 feet, common.—Distrib. Moulmein ; Mts. of Malabaria and Ceylon. 
Belongs to sect. Pseudocystopteris, the involucre being often at the bifurcation of a 
vein. . The venation, however, only very slightly tends to that of Cystopteris. The sori 
may be considered terminal on the veinlet, as they are slightly above the bifurcation. In 
the typical form the scales of the rhizome are closely sessile, attached by their middle, 
their whitened edges being imbricate when fresh, slightly recurved when dry. 
Var. pseudo-cystopteris, sp. Kunze, in Bot. Zeit. 1850, 68. Scales of the rhizome more 
spreading; ultimate segments often very acute.—Acrophorus pseudo-cystopteris, SE 
Bedd. Ferns Brit. Ind. t. 92. Cystopteris dimidiata, Dene. in Jacquem. Voy. Bot. — — 
t. 178. (Pl. XLIX. fig. 4.) go 
Himalaya; from Dalhousie to Nepaul, alt. 4000-8000 feet.—This seems only a north- 
west var. of D. pulchra. Some of the examples of D. pulchra collected by Sir J. D. 
Hooker in North Sikkim at 11,000 feet alt. seem to run into the var. D. pseudo- 
eystopteris. 
(Hk. & Baker, Syn. Fil. 92, give East Himalaya as a habitat for D. affinis, Hook. ; but 
I have never seen that species from North India. The Himalayan examples so named 
in the Kew Herbarium are D. pulchra, Don, type. Mr. Baker further adds that — i 
D. affinis is probably a var. of D. pulchra ; but Beddome (in Ferns South. Ind. t. 252) 
rightly remarks that the rhizomeis very different. The two species appear to me clearly. 
distinct; but they will not be so if Himalayan examples are called D. affinis.] : 
8. D. noposa, Hook. Sp. Fil. i. 157. Frond large, broad, compound, usually 4-pinnatifid ; 
lower pinnæ often opposite or subopposite; ovate scales scattered on the rhachis,  — 
especially at the base of the pinnsz and pinnules; ultimate segments oblong or  — 
obovate-oblong, not acute.—Hook. Journ. Bot. 1857, t. 10; Hk. & Baker, Syn. Fil. i: E ; 
92. D. stipellata, Wall. Cat. 260.. D. ligulata, Wall. Cat. 254. Aspidiwm nodosum, a T 
Blume, Enum. Pl. Jav. Fil. 171. A. foliolosum, Wall. Cat. 359. Acrophorus 
nodosus, Presl, Tent. Pterid. t. 3. fig. 2; Bedd: Ferns Brit. Ind. t. 93. bag E 
nodosa, Mett. in Ann. Mus. Lugd. Bat. i. 24]. E. 
Himalaya ; from Nepaul to Bhotan, alt. 3000—7000 feet; abundant in Sikkim. Ehasia 3 de 
alt. 3000-6000 feet, common.—Distrib. Malacca, Java. 
Rhizome underground, — creeping, the summit with lax ovate not acute scales 
