TAB. L. 
Adiantum monochlamys, Eaton. 
Caudice horizontali fusco-tomentoso, stipitibus spithamseis 
rachibusque. flexuosis castaneis nitidis, frondibus ovatis 
acuminatis cbartaceis pallide viridibus tripinnatis, pinnulis 
omnibus sublonge petiolulatis obcordato-cuneatis apice 
crenato-serratis in sinu profundo monosoris, venis flabella- 
tis dichotome divisis, involucro suborbiculari coriaceo atro- 
fiisco. 
Adiantum monocblamys, Eaton, in Proceedings of Am. Acad* 
Arts Sc. for 1809. p- 110. 
Hab Hill-sides, near Simoda, Japan, (7. Wright ; Tsus Sima, 
Strait of Korea, Wilford^ n. 837. 
A very elegant and unquestionably a very distinct species 
of Adiantum, well named monochlamys by its first describer. 
Among my specimens there is no instance of more than one 
sorus on each pinnule, and that arises from a deep sinus at the 
almost truncated apex. 
Tab. L. Fertile plant; nat. size. Fig. 1. Back view of a 
fertile pinnule, f 2 Front view showing the sorus : magnified. 
CbkTj 2.x. 60. 
