MR. C. B. CLARKE ON THE FERNS OF NORTHERN INDIA. 505 
larly on the back, not dehiscing along an edge.—This differs from Asplenium sect. Anisogo- 
nium and Hemidictyum by the sori breaking up on the back, from Asplenium sect. Pseud- 
allantodia by thereticulated veins. But itis difficult to see why it should be retained as à 
genus while such sections are made subgenera of Asplenium. One fine specimen collected 
by W. S. Atkinson in Sikkim has most of the involucres allantodioid, but a few distinctly 
diplazioid, i. e. placed back to back and both opening by a clean dehiscence from the edge 
remote from the vein. 
1. A. JAVANICA, Bedd. Ferns Brit. Ind. Suppl p. 13. Tufted; frond 1-4 feet; lower 
pinne often opposite.—A. Brunoniana, Wall. Pl. As. Rar. i. 44, t. 52; Hk. & Bauer, 
Gen. Fil. t. 1204; Hook. Sp. Fil. iii. 275; Bedd. Ferns South. Ind. t. 159; Hk. & 
Baker, Syn. Fil. 246. Asplenium javanicum, Blume, Enum. Pl. Jav. Fil. 175. A. 
reticulatum, Wall. Cat. 188. A. Brunonianwm, Mett. Farngatt. Aspl. 170. Hemi- 
dictyum ? Brunonis, Presl, Tent. Pterid. iii. t. 3. figs. 25, 26. 
Nepaul to Bhotan, alt. 4000-7000 feet; frequent. Khasia; Mikir Hills, Simons.— 
Distrib. Ceylon, Java, Samoa. 
97. ACTINIOPTERIS, Link. 
Bedd. Ferns Brit. Ind. Suppl. p. 13. 4. radiata, Link; Hook. Ic. Pl. 
erns South. Ind. t. 124; Hk. & Baker, Syn. 
orskh. Fl. Ægypt. Arab. 184. A. radiatum, 
le, Linn. f. Suppl. 444; Vahl, 
1. A. DICHOTOMA, 
tt. 975, 976, Sp. Fil. iii. 276; Bedd. F 
Fil. 246. Acrostichum dichotomum, F 
Roxb. in Cale. Journ. Nat. Hist. iv. 479. A. austra 
Symb. i. 84, t. 25. Asplenium australe, Swartz, Syn. Fil. t. 3. fig.1. A. radiatum, . 
Swartz; Wall. Cat. 197. Pteris australis, Hk. & Grev. Ic. Fil. t. 8. Pt. radiata, 
Mett. Fil. Hort. Lips. t. 15. fig. 6. Acropteris radiata and australis, Link, Hort. 
Berol. ii. 56. Blechnum flabellatum and radiatum, Presl, Tent. Pterid. 103. 
Base of the North-west Himalaya, alt. 0-2000 feet, in Kumaon and West Nepaul in 
the crevices of hot rocks; rare in the Hindoosthan plain, as at Agra, Delhi, and Morada- 
bad.—Distrib. South India and Ceylon, Ava, Cabul and Persia, Arabia, Egypt to Angola 
and the Zambesi. 
98. AsPIDIUM, Swartz. 
_ [This is Aspidium, Swartz, only very partially. I follow Hk. & Baker, Syn. Fil., here 
for convenience of reference, and to avoid printing new names. Aspidiwm (as here 
treated) excludes the subgenus Euaspidium itself, and includes those species which 
have free or little anastomosing veins, an aspidioid not nephrodioid involucre, and (very 
frequently) a coriaceous shining texture and spinulose-serrate margin. | 
Subgenus I. Polystichum. Veins all free. 
Swartz in Schrad. Journ. 1800, ii. 30. Frond linear, 1-pinnate, 
1. A. LONCHITIS, 
. tapering at the base; lower pinnee barren, often reduced to auricles; stipe and lower 
S 322 
