MR. C. B. CLARKE ON THE FERNS OF NORTHERN INDIA. 503 
Himalaya, alt. 2000-9000 feet ; from Kashmir to Bhotan very common. Khasia, alt. 
1000-5000 feet; common. Chittagong, alt. 200 feet, C. B. Clarke.—Distrib. South 
India and Ceylon, Burma, Malay Peninsula and Islands, China, Philippines, Australia. 
Beddome states (Ferns Brit. Ind. Suppl. p. 13) that he found the Kew bundle of 
A. maximum (a Fern that has always puzzled botanists in India) to consist of a mixture 
of A. latifolium with A. decurrens: I concur. What 4. maximum, Don, Prodr. Fl. Nep. 
8, may have been can only be guessed ; but from Don’s description of the sori I should 
guess it to have been A. polypodioides.—Beddome's A. decurrens (Ferns South. Ind. 
t. 229) is sent me by Thwaites, named 4. Schkuhrii: itis A. Schkuhrii, Thwaites, Hk. 
& Baker, Syn. Fil. (2nd ed.) 491, excluding the syn. Bedd.; but it is not 4. Sehkuhrii, 
Hook. Sp. Fil. iii. 251, Hk. & Baker, Sp. Fil. 235, which is Diplazium Schkuhrii, Bedd. 
Ferns South. Ind. t. 230. "There are here 3 plants :— 
a. japonicum, with 1-pinnate fronds. 
8. decurrens, with 2-pinnate fronds, a secondary pinna of this resembling a primary 
pinna of 4. japonicum. 
y. dilatatum, with 2-pinnate fronds, secondary pinne very large. 
How A. arborescens, Mett., and several others are distinguishable from A. latifolium 
I do not see. 
Var. frondosa. Involucres very early disappearing; the plant frequently supposed a 
Gymnogramme ; cutting slightly but invariably unlike the typical 4. dilatatum. 
North-west Himalaya to Sikkim.— This is the real 4. frondoswm, Wall. type, which he 
afterwards arranged as a var. of A. polymorphum, Wall. Cat. 230. The sori are often 
shorter and straight, and become very thick, almost covering the segments in full fruit. 
Subgenus VII. Anisogoniwm. Veins copiously anastomosing. Involucres linear or 
oblong, many placed back to back, dehiscing from their outer edge. 
53. A. HETEROPHLEBIUM, Mett.; Hk. & Baker, Syn. Fil. 243. Stipes tufted, frond 1- 
pinnate.—Anisogonium heterophlebium, Bedd. Ferns Brit. Ind. t. 329. 
East Nepaul to Mishmee; alt. 4000-6000 feet; frequent in Sikkim. 
54. A. ESCULENTUM, Presl Rel. Henk. i. 45. Nearly always bipinnate; sori linear, 
-parallel.—Hook. Sp. Fil. iii. 268; Hk. & Baker, Syn. Fil. 245; Benth. Fl. Hongk. 
452. A. bipinnatum, Roxb. in Cale. Journ. Nat. Hist. iv. 499. A. pubescens and 
Moritzii, Mett. Fil. Hort. Lips. t. 11. figs. 3, 4. Diplazium malabaricum, Spreng. ; 
Blume, Enum. Pl. Jav. Fil. 193. D. esculentum, Swartz; Carr. in Fl. Viti. 356. 
Hemionitis esculenta, Retz. Obs. vi. 28. Anisogoniwm esculentum and serampurense, 
Presl, Tent. Pterid. 116. Digrammaria ambigua, Hk. & Bauer, Gen. Fil. t. 56c 
(Pof Presl). Callipteris esculenta, J. Smith; Bedd. Ferns South. Ind. t. 164. 
Bengal Plain, very common ; Hindoosthan, much less common. Common at the base 
of the hills, but rarely ascends 1000 feet.—Distrib. South India and Ceylon, Malay 
Peninsula and Islands, China. 
Young plants sometimes produce 1-pinnate fronds, 
SECOND SERIES.— BOTANY, VOL. I. 32 
