984 CHARACTERS OF TRIBES AND GENERA. 
tionally normal, consequent on the cold climate of the 
regions in which itis found, namely, Siberia and Kams- 
chatka. 0. farinosa has a wide geographical range, 
generally within or near the tropics of the Eastern Hemi- 
sphere, and recently it has been found in New Granada. 
C. rufa, Don, 
ttt Fronds with yellow farina on the under side. i 
. C. aurantiaca (Cav.), Hook. Ic. PL, t. 904; C. chryso- 
phylla, Hook., Fil. Exot., t. 95, fig. 1. 
.159.—OasseBEERA, Kaulf. (1824). 
Hook. Sp. Fil. 
Vernation uniserial sarmentum short. Fronds tripartite 
or pinnate, 6 to 18 inches high, long stipate, stipes and 
rachis smooth, castaneous; pinnæ oblong, 2 to 3 inches in 
length, margin thick, emarginate. Veins internal, obscure, 
forked, free. Sporangiferous receptacles terminal, puncti 
form, laterally connivent in pairs. Indusium intramarginal, à 
in short, linear pieces, each piece including the connivent 
sporangia, forming oblong sori. | 
—. Type. Adiantum triphyllum, Smith, 
Illust. Hook. and Bauer Gen. Fil., t. 66, A; Moore Ind 
Fil., p. 27, B; Hook. Syn. Fil., t. 3, fig. 26. 
Oss.— This genus was originally ended upon two Ferns, ` 
natives of Brazil; although not differing much in general ` 
habit or in ee characters from Pellwa, it is never. 
theless retained by most authors as a genus; a third 
species, C. gleichenioides, has been referred to this genus 
by its discoverer, Dr. Gardner; it is, however, so widely 
different in habit and appearance, and in its technical 
characters, that I deem it advisable to separate it from 
Cassebeera (see Ormopteris). 
Sp. C. triphylla, Kaulf.; C. fixit, Kauf. 
