Wallichiane. © N. O. Filices. 
TAB. DCXXII. 
HEMITELIA? ALTERNANS. Hook. 
Inermis, frondibus pinnatis v. bipinnatis, pinnis remotis petiolatis 
alternis oblongo-lanceolatis coriaceo-membranaceis acumina- 
tis profunde pinnatifidis segmentis oblongis subacutis vix 
serrulatis, venis liberis basi furcatis, soris in venulas supra 
furcaturas (rarius axillaribus) seriatim dispositis inter margi- 
nem et costam, involucro peltato tenui-membranaceo sub- 
integro. 
Hemitelia? alternans. Hook. Sp. Fil. p. 29. 
Polypodium alternans, Wail. Cat. n. 329. 
Has. Penang. Dr. Wallich. Lady Dathousie. 
The Ferns, composing the family or group of Cyatheacee, pre- 
sent so many forms of fructification, as regards the involucre, 
that it seems hardly possible to limit the generic distinctions. _ 
The present does not possess the deep cup of Cyathea, nor the 
lateral and dimidiate one of Hemitelia. As a species, it is 4 
very fine and distinct one, discovered by Dr. Wallich in Penang, — 
and subsequently by Lady Dalhousie in the same island. The o 
pinne are very large, deeply pinnatifid, and exhibiting fructifica- _ 
tions in a line or series between the margin and costa of the 
Segments. The receptacles produce copious hairs among the 
capsules, 
Fig... Portion of a segment of the pinna with sori, showing 
the veining. f, 2, Sorus, covering the involucre. /.3. Involucre, 
most of the capsules and hairs being removed from the sorus: — 
magnified—f. 4, Portion of the stipes: natural size. 
