450 MR. C. B. CLARKE ON THE FERNS OF NORTHERN INDIA. 
18. CYSTOPTERIS, Bernh. 
1. C. sETosA, Bedd. Ferns Brit. Ind. t. 312. Lasírea setosa, Bedd. Ferns Brit. Ind, 
t. 262. Davallia setosa, Hk. & Baker, Syn. Fil. 468. 
Sikkim ; alt. 5000-8000 feet, very common.—Distrib. Moulmein. 
Tufted, the stipes rising from nearly one point. Frond 1-3 feet; both surfaces more 
or less scattered with white lax hairs, whieh consist of a single row of cells varying in 
size. Veinlets carried straight (often undivided) beneath the sorus to the margin of the 
leaf. The genus must be Cystopteris if that genus is retained. Mr. Baker has probably. 
placed C. setosa in Davallia because of its large size. If the two genera are united, the 
place of C. setosa will not be in Leucostegia (where Mr. Baker has put it), but in Micro- 
lepia near D. spelunce. The involucre in C. setosa is small, subquadrate, white, of lax 
tissue, attached by the base, and at a very early stage scarcely attached elsewhere—is in 
all respects that of Cystopteris. The involucre is usually directly across an undivided 
vein, not as in D. pulchra, var. pseudo-cystopteris. 
2. C. FRAGILIS, Bernh. in Schrader, Neu. Journ. ii. 27, t. 2. fig. 9; Hk. E Bauer, Gen. 
Fil t. 525; Hook. Sp. Fil. i. 197; Hook. Brit. Ferns, t. 23; Bedd. Ferns Brit. 
Ind.t. 91; Hk. & Baker, Syn. Fil. 103; Benth. Fl. Austral. vii. 752. C. fragilis, 
A form 12 Huteri, Milde, Fil. Europ. 149. C. retusa, Dene. in Jacquem. Voy. Bot. 
t. 177. 
North-west Himalaya ; from Kashmir and Baltistan to Kumaon, alt. 10,000—15,000 feet, 
not rare. Sikkim, 7. Thomson.—Distrib. Central Asia, and in almost the whole globe 
in cold regions. 
Fronds 4-6 in., sometimes a foot, always weak, glabrous. Requires to be separated 
with care from the small high-level Athyriwms; examples in over-ripe fruit can harig 
be safely distinguished. 
14. LINDSAYA, Dryand. 
E? CULTRATA, Swartz, Syn. Fil. 119. Frond simply pinnate ; ; scales of the rhizome 
linear; pinne unequal-sided, lower edge nearly straight near the main nerve; 
veins free, or uniting only at the base of the sori.—Hk. & Grev. Ic. Fil. t. 144; 
Hook. Sp. Fil. i. 203; Blume, Enum. Pl. Jay. Fil. 216; Hook. Fil. Exot. t. 67; 
Bedd. Ferns South. Ind. t. 23; Hk. & Baker, Syn. Fil. 105; Benth. Fl. Austral. 
vii. 719. LZ. lucida, Blume, Enum. Pl. Jav. 216 ; Hook. Sp. Fil. i. 206 ; Wall. Cat. 
145. L. gracilis, Blume, Enum. Pl. Jav. Fil. 216; Hook. Sp. Fil. i. 207. L. odorata, 
Roxb. in Calc. Journ. Nat. Hist. iv. 511. L. Lobbiana, Hook. Sp. Fil. i. 205, t. 620; . 
Bedd. Ferns Brit. Ind. t. 28. ZL. attenuata, Wall. Cat. 151. ZL. pallens, Wall. ` 
Cat. 148. : 
From Nepaul to Mishmee and Chittagong, alt. 0-4000 feet, very common.—Distrib. 
Mts. of the South Deccan and Ceylon, Malay Peninsula and Islands, North Australia, 
Formosa, Japan, East-African Islands. y 
. Rhizome wiry, tangled, subterranean; stipes approximate. Taking the two extreme ` 
