TAB. XLII. 
Asplenium (Euasplenium) prolongatum, Hook. 
Caudice parvo ascendente radicante vlx squamoso, stipitlbus 
casspitosis 2-4 uncias longis stramineis siibcompressisj frond- 
ibus 4-5-uncialibus ad pedalem coriacels seu subcbartacels 
oblong! s vel linearl-oblongis saspe falcatis bl-subtripinnatis, 
radii apice prolongata caudiformi nuda radicante 1-2 uncias 
longa, pinnis prirnariis 1-lJ uncias longis horizontaliter 
patentibus ssepe approximatis semiovatis obtusis petiolatis 
seraipinnatis (seu pinnulis bine longioribus numerosioribus), 
pinnulis 3-4 lineas longis plerisque simplicibus integris raro 
furcatis ad basin superiorem bi-tripartitis, venis costiformi- 
bus, soris oblongis submarglnalibus, involucris firmis mem- 
branaceis colore frondis. 
Asplenium prolongatum, Hook. Sp, Fit. 3. p. 209. 
Hab. On Trees, East Indies, Mlsbmee, Griffith^ Simons^ n. 
235 ; Kbasya, Hook. Fih et Thomson ; Bbotan, Booth ; 
Ceylon, Mrs. Gent. Walker , Gardner^ n. 1348; Tsus Sima, 
Strait of Korea, Wilford. 
A very elegant and well marked species, retaining its 
cbaracteristic distinctions in all tbe specimens from tbe seve- 
ral localities above mentioned. Nearly every one exhibits 
tbe remarkable prolongation of tbe raebis, rooting at tbe 
apex and often very proliferous there. Of tbe primary pin- 
naa tbe longest and most numerous pinnules are always on 
tbe upper half. 
Fertile plant ; nat. size. Fig. 1. Pinna, f. 2. Sorus : 
magnified. 
Cent. 2 , t. 42 . 
