284 CHARACTERS OF TRIBES AND GENERA. 



tionally normal, consequent on the cold climate of the 

 regions in which it is found, namely, Siberia and Kams- 

 chatka. C. 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. 



tff Fronds with yellow farina on the under side. 

 C. aurantiaca (Cav.\ Hook. Ic. PI., t. 904 ; C. chryso- 

 phylla, Hook., Fil. Exot., t. 95, fig. 1. 



159. CASSEBEERA, 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 ; pinnae 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, 

 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. 



OBS. This genus was originally founded upon two Ferns, 

 natives of Brazil ; although not differing much in general 

 habit or in technical characters from Pellcea, 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 appearanae, and in its technical 

 characters, that I deem it advisable to separate it from 

 Cassebeera (see Ormopteris). 



Sp. C. triphylla, Kaidf. ; C. pinnata, Kaulf. 



