TAB. XLII. 



Asplenium (Euasplenium) prolongatum, Hook. 



Caudice parvo ascendente radicante vix squamoso, stipitibus 

 casspitosis 2-4 uncias longis stramineis subcompressis, frond- 

 ibus 4-5-uncialibus ad pedalem coriaceis seu subchartaceis 

 oblongis vel lineari-oblongis ssepe falcatis bi-subtripinnatis, 

 rachi apice prolongata oaudiformi nuda radicante 1-2 uncias 

 longa, pinnis primariis 1-1 \ uncias longis horizontaliter 

 patentibus saspe approximatis semiovatis obtusis petiolatis 

 seraipinnatis (seu pinnulis hinc longioribus numerosioribus), 

 pinnulis 3-4 lineas longis plerisque siinplicibus integris raro 

 furcatis ad basin superiorem bi-tripartitis, venis costiformi- 

 bus, soris oblongis submarginalibus, involucris firmis mem- 

 branaceis colore frondis. 



Asplenium prolongatum, Hook. Sp. Fil. 3. p. 209. 



Hab. On Trees, East Indies, Mishmee, Griffith, Simons, n. 

 235 ; Khasya, 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. /. 2. Sorus: 

 magnified. 



Cent. 2. t. 42. 



