TAB. XLII. 
Asplenium (Euasplenium) prolongatum, Hook. 
Candice parvo ascendente radicante vix squamoso, stipitibus 
ciespitosis 2-4 uncias longis stramineis subcompressis, froncl- 
ibus 4-5-uncialibus ad pedalem coriaceis seu subchartaceia 
oblongis vel lineari-oblongis srepe falcatis bi-subtripinnatis 
rachi apice prolongata caudiformi nuda radicante 1-2 uncias 
longa, pinnis primariis 1-1J uncias longis horizontaliter 
patentibus siepe approximatis semiovatis obtusis petiolatis 
seraipinnatis (seu pinnuKs bine longioribus numerosioribus) 
pinnulis 3-4 lineas longis plerisque simplicibus integris raro 
furcatis ad basin superiorem bi-tripartitis, venis costiformi- 
bus, soris oblongis submarginalibus, involucris firmis meni- 
branaceis colore frondis. 
Asplenium prolongatum, Hook. Sp. Fil. 3. p. 209. 
Hab. On Trees, East Indies, Mishmee, Griffith , Simons, n. 
235 ; Kbasya, Hook. Fil. et Thomson ; Bhotan, Booth ; 
Ceylon, Mrs. Genl. Walker, Gardner, n. 1348 ; Tsus Sima, 
Strait of Korea, Wilford. 
A very elegant and well marked species, retaining its 
characteristic distinctions in all the specimens from the seve- 
ral localities above mentioned. Nearly every one exhibits 
the remarkable prolongation of the rachis, rooting at the 
apex and often very proliferous there. Of the primary pin- 
na; the longest and most numerous pinnules are always on 
the upper half. 
Fertile plant; not. size. Fig. 1 . Pinna, f. 2. Sorus : 
magnified. 
Cent. 2. t. 42. 
