MR. C. B. CLARKE ON THE FERNS OF NORTHERN INDIA. E. 
Nearly every separate specimen that I have collected in India will make a. species at 
Fée's standard of species-making; and yet the fern is not a variable one. 
2..À. viscosuM, Swartz, Syn. Fil 10, 193. Rhizome very short, with lanceolate hair- 
pointed scales; stipes and frond more or less pubescent, often stellate-hairy or 
squamose.—Hk. & Grev. Ic. Fil. t. 61; Wall. Cat. 15; Blume, Fl. Jav. Fil. 27; 
Fée, 2" Mém. Foug. 45; Hook. Sp. Fil. v. 220; Hk. & Baker, Syn. Fil. 406. A. 
nerüfoliwn, Wall. Cat. 16. A. stelligerum, Wall. Cat. 2167; Hk. & Baker, Syn. 
Fil. 2nd ed. 521. Elaphoglossum viscosum, Bedd. Ferns South. Ind. t. 196. 
Sikkim and Nepaul, alt. 6000-8000 feet, frequent. Khasia, alt. 4000-6000 feet, rather ` 
common.—Distrib. South India, Ceylon, Malaya, Southern and Tropical Africa, 
Tropical America. | 
The North-Indian material is very uniform. The Kew bundle of 4. stelligerum (all 
from the South Indian Mts.) contains plants which I cannot distinguish from the 
Khasia A. viscosum, nor can Col. Beddome (see Ferns Brit. Ind. Suppl. p. 26). 4. stigma- 
tolepis (from the Nilgherries), Fée, 2" Mém. Foug. t. 25. fig. 2, seems to me nearer 
A. conforme than A. viscosum. | 
Subgenus II. Stenochlena (cum Polybotrya and Egenolfia). ‘Veins free. 
Fronds pinnate or deeply pinnatifid. 
3. A. PALUSTRE, Bedd. Ferns Brit. Ind. Suppl. p. 26. Climbing often 30-40 feet high 
on trees; barren pinne of shining hard texture, margin serrate or entire; veins 
close, parallel, furcate near the base or simple.—A. scandens, Hook. Sp. Fil. v. 412; 
Hk. & Baker, Syn. Fil. 412; Benth. PL Austral vii. 778. Lomaria scandens, 
Willd. Sp. Pl. v. 293. ZL. limonifolia, Wall. Cat. 36. Pteris scandens, Roxb. in 
Cale. Journ. Nat. Hist. iv. 505.  Stenochlena scandens, J. Smith; Hk. & Bauer, 
Gen. Fil. t. 105 8; Carr. in Fl. Viti. 373; Bedd. Ferns South. Ind. t. 201. Poly- 
podium palustre, Burm. Fl. Zeyl. 234. 
Throughout the plain of Bengal, abundant; and in the tropical valleys within the 
neighbouring mountains, rarely ascending so much as 2000 feet.—Distrib. South India, ` 
Ceylon, Malay Peninsula and Islands, South China, Queensland, Polynesia. — 
This fern though plentiful at Caleutta rarely fruits there; while 50 miles eastwards 
it fruits abundantly. | 
4. A. APPENDICULATUM, Willd. Sp. Pl. v. 114. Rhizome very short; barren pinnæ a 
heavy green; veins branching pinnately.—Hook. Exot. Fl. ii. t. 108, Sp. Fil. v. 251; 
Hk. & Baker, Syn. Fil. 415. 4. viviparum, Wall. Cat. 28; Hook. Exot. FI. ii. 
t. 107. A. Hamiltonianum, Wall. Cat. 29. A. Wightianum, Wall. Cat. 2163. A. 
ludens, Wall. Cat. 2685, A. asplenifolium, Bory in Bélanger, Voy. Bot. 23, t. 3 
A. setosum, Wall. Cat. 30.  Polybotrya appendiculata, Bedd. Ferns South. Ind 
tt. 194, 195, Ferns Brit. Ind. tt. 110, 111. P. marginata, Blume, Fl. Jav. Fil. 18, 
HM A D. intermedia, J. Smith ; Fée, 2™ Mém. Foug. 76, t. 40. fig. 1. de P 
