550 MR. C. B. CLARKE ON THE FERNS OF NORTHERN INDIA. 
Himalaya, alt. 5000-9000 feet; from Gurwhal to Bhotan; common. Khasia, alt. 
4000-5000 feet ; C. B. Clarke, frequent. 
Some of the Khasi specimens are not larger than P. trichomanoides, and ciliate nearly 
as P. trichomanoides ; but the sori are more than one to each lobe. 
Subgenus V. Goniophlebium. Fronds 1-pinnate or sub-l-pinnate. Sori terminal on a 
free veinlet, one included in each costal arch of the pinne. 
20. P. amanum, Wall. Cat. 290. Rhizome stout, as thick as a small quill, densely 
 elothed with grey-brown lanceolate-subulate scales, which are subadpressed, never 
hair-pointed ; near the base of the main rhachis are sometimes ovate or lanceolate 
scales; lower pinnz not quite free; costal arches of the main rhachis continued 
nearly or quite to the base of the frond; main rhachis above pubescent.—Mett. 
Farngatt. Polypod. 80; Hook. Sp. Fil. v. 24; Hk. & Baker, Syn. Fil. 341.  Gonio- 
phlebium amenum, J. Smith; Bedd. Ferns Brit. Ind. t. 5. 
Himalaya, alt. 4000-11,000 feet; from Gurwhal to Bhotan, very common. Khasia; 
alt. 3000-6000 feet, very common. (I doubt whether the Formosa examples belong.) 
I can only distinguish this from some of the large specimens of P. lachnopus by the 
scales not being hair-pointed. There is no difference in the cuttin g between the two, 
and I have P. /achnopus exceedingly large. 
Var. ?fonglensis. Frond 2-5 in.; veins wider apart than in the typical amenum. 
Tonglo, Sikkim, alt. 1000 feet, C. B. Clarke.—I can make nothing ofthis: the rhizome 
and scales are exactly as in P. «manum ; pinnæ subobtuse, glaucous beneath, none free. 
21. P. susAMGNUM, C. B. Clarke. Rhizome slender, densely clothed with grey-brown 
lanceolate-subulate scales, which are subadpressed never hair-pointed; near the 
base of the main rhachis are sometimes ovate or lanceolate scales; lower pinnee not 
quite free; costal arches of the main rhachis continued nearly or quite to the base 
of the frond ; main rhachis above glabrous or puberulous. (Pl. LXXXII. fig. 2.) 
Dividing ridge between Sikkim and Nepaul, alt. 11,000-12,000 feet; in great 
quantity. 
Very close to P. amenum, from which it is separable by its slender rhizome and small 
size. Ifound it arranged at Kew under P. Hendersoni, which is not very near it. The 
frond of P. amænum is broader, less fully pinnate, the pinne less markedly serrate 
(besides the characters in the above diagnosis). 
22. P. HENDERSONI, W. S. Atkinson; Hk. & Baker, Syn. Fil. 2nd ed. 511. Rhizome 
somewhat slender, glaucous, densely clothed with hair-pointed brown-black scales, 
spreading from small ciliate bases ; stipe and base of the main rhachis often with 
similar scales ; lower pinnze usually quite free; costal arches of the main rhachis 
.. broken towards the base of the frond ; main rhachis above glabrous.— Goniophlebium 
-Hendersomi, Bedd. Ferns Brit. Ind. Suppl. p. 21,1.883. = | 
