MR. C. B. CLARKE ON THE FERNS OF NORTHERN INDIA. 499 
guum, Schk. Krypt. Gew. t. 75, not t. 75 b. A. decussatum, Wall. Cat. 2208. 
A. Thwaitesii, A. Braun; Mett. Farngatt. Aspl. 183; Hook. 2nd Cent. Ferns, t. 45, 
Sp. Fil. iii. 250; Hk. & Baker, Syn. Fil. 235. .4. tomentosum, Mett. Farngatt. 
Aspl. 182, not of Hook. A. lasiopteris, Hk. & Baker, Syn. Fil. 235. Diplazium 
Schkuhrii, Bedd. Ferns South. Ind. t. 230 (not quite Asplenium Schkuhrii of Thwaites 
and Baker). D. Thwaitesii, Bedd. Ferns Brit. Ind. t. 291. D lasiopteris, Kunze ; 
Bedd. Ferns South. Ind. t. 160. D. bulbiferum, Brack. U.S. Explor. Ferns, t. 18. 
fig. 2 (but the names under the two ferns figured in this plate have perhaps been 
transposed). 
North-west Himalaya; Nepaul, Wallich; Nynee Tal, Edgeworth, H. C. Levinge; 
Kangra, Edgeworth; Kumaon, Strachey and Winterbottom. Khasia; alt. 3000 feet, 
abundant, C. B. Clarke. Chittagong; alt. 200 feet, common, C. B. Clarke.— Distrib. 
South India and Ceylon, Burma, Malaya, China, Japan, Polynesia. 
The distribution and varieties of this fern are puzzling. The North-west Himalayan 
plant is the same as the typical South-Indian; no other North-Indian examples except 
these three sheets exist at Kew; but the fern is abundant in East Bengal, whence I 
have brought in large quantity two Khasi and two Chittagong forms. All these North- 
Indian forms have a distinctly creeping rhizome, and are (in my judgment) trifling 
varieties (except var. chattagramica). They vary much in size and hairiness: the 
ordinary Khasi and Chittagong plant is very glabrous; the 2nd Khasi form has the 
rhachis pubescent, and is altogether more hairy than 4. tomentosum, Hook. ; it has been 
distributed by me as A. tomentosum, Hook., erroneously. Small forms of this much 
resemble A. grammitoides, Hk. & Baker, Syn. Fil. (ed. 2), 491. 
Var. chattagramica. Frond 2-pinnate; some of the secondary pinnz subpetioled ; sori 
reaching to the edge, but not commencing from the midrib. (Pl. LXIV. fig. 1.) 
Kasalong, Chittagong Hills, €. B. Clarke.—Mr. Baker is not willing to place this 
under A. japonicum; but I feel sure, from its variation, that it belongs here. As to 
the nearly allied forms I may mention, in passing :— 
(Var. ?) Schkuhrii, (sp.) Thwaites; Hk. & Baker Syn. Fil. (ed. 2), 491, excl. the figure 
of Bedd. quoted. Large, compound ; the secondary pinnze 3 in., deeply pinnatifid. 
—D. decurrens, Bedd. Ferns South. Ind. t. 229. : 
Cachar, R. L. Keenan. | | 
A. polyrrhizon, Hk. & Baker, Sp. Fil. (ed. 2), 490, only differs from A. japonicum in 
having a non-creeping rhizome. Beddome (Ferns Brit. Ind. Suppl. p. 12) doubts if this 
distinction can be relied on: I share his doubts. (A. polyrrhizon does not approach 4. 
tomentosum, Hook.) 
Diplazium malaccense, Presl; Fée, Gen. Fil. 213, t. 176. The authentic specimen of 
this is the tip of a very large pinna of D. latifolium, Don. 
Asplenium Schkuhrii, Mett. Farngatt. Aspl. 182. The authentic specimen marked by 
Mettenius’s hand is 4. sylvaticum. 
^^ Diplazium speciosum, Bedd. Ferns Brit. Ind. t. 290, is said by Beddome to be equal to 
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