TAB. LII. 
Polypodium (Marginaria) lachnopus, Wall. 
Frondibus glaberrimis membranaceis firmis oblongo-lan- 
ceolatis acuminatis profunde fere ad costam pectinatim 
pinnatifidis, lobis linearibus acutiusculis obtuse serratis ad 
costam subtus minute nigro-squamulosis, squamulis cor- 
datis ciliatis longe cuspidatis nigris, soris uniserialibus, 
yenulis prope costam areolas formantibus reliquis liberis 
furcatis, stipite brevi nudo, caudice longe repente nigro- 
paleaceo. 
Polypodium lachnopus, Wall. Cat . n. 310. 
Hab. Nepal and Kamaon, Wallich . Khasya, Drs. Hooker and 
Thomson . 
Mr. J. Smith brings this into the genus Goniophlebium , 
Presl, and this he unites with Marginaria, Bory and Presl. : 
but the venation of Presl’s Goniophlebium is very different from 
that of Marginaria , which is what is represented at the base 
of the lobe or segment of our plant (see fig. 1.) while all the 
rest of the lobe has the venation of true Polypodium, with free 
veins clubbed at the apex. Our plant is thus intermediate 
between the two genera now mentioned. The minute 
scales at and near the main costa present a beautiful ap- 
pearance under the microscope: they are nearly black, 
almost orbicular, finely reticulated and have a long cuspi- 
date or setiform point, (f. 2.) Under a lens too the upper 
side of the costa will be found pubescent. 
Fig. 1. Fertile lobe, seen from beneath, and showing the 
venation, f. 2. Scale from the rachis beneath : — magnified. 
