Ferns of British India and Ceylon. 75 
4. LiNDSAYA ORBicuLATA. {Lam. Wider Adiantum.) Rhizome 
creeping ; stipes tufted, generally elongated, fronds linear-lanceolate 
and pinnate or deltoid and bipinnate ; pinnules approximate shortly 
petiolate, rather rigid flabellate, and approaching to lunate or sub- 
rhomboid, with the sides unequal, the base obliquely cuneate, some- 
times the upper ones are confluent, the superior margin crenulate or 
soriferous ; no distinct midrib ; sori continuous or interrupted ; in- 
volucres toothed. Hook. Syn. FiL i. 211. L. flabellulata, Hook. 
Sy?t. Fil. p. 107. Bedd. F. B. I. t. 216. 
Davallia trichomanoides, Bedd. F. B. I. t. 178 (not Blume) an 
abnormally cut variety. D. schizophylla, Hook, Syn. FiL p. 468. 
Var. /5 TENERA. Pinnulcs of thinner texture, and obtusely 
rounded in outline. Bedd. F. S. I. t. 24. This is the only form 
found in the Madras Presidency. 
Western Forests of Madras; Ceylon; Khasya, Assam, Jaintea; 
Malay Peninsula. 
(Also in South China and Australia.) 
5. LiNDSAYA Lancea. (Z. tinder Adiattttmi.) Rhizome creep- 
ing ; stipes strong, up to 12 inches long ; frond up to 15 inches long, 
bipinnate ; pinnae, several pairs erect-patent ; pinnules about i inch 
long, by \-\ inch deep, the lower line nearly straight, the upptr 
rounded entire; texture pellucid-herbaceous ; sori in a continuous 
line round the upper margin. Ad'antum Lanceum. L. Lindsaea tra- 
peziformis (Dry.), Hook. Syn. Fil. 107. L. caudata (Hook.), Bedd. F. 
S. I. i. 21 7. Mr. Wall sends from Ceylon a form with numerous 
pinnae, which taper away into a long caudate apex, the lower pinnules 
being obovate from a longish stalk, and much smaller than in the type ; 
the upper pinnules very small and tongue-shaped. 
Ceylon ; Malay Peninsula. 
(Also in Tropical America, the West Indies, and the Malay 
Islands.) 
6. LiNDSAYA RiGiDA. {J. Sm.) Rhizome wide-creeping, stipes 
4-6 inches long, rigid, erect, prickly towards the base ; fronds with 
a long unbranched central point, and 1-4 pair of flexuose lateral 
