284 CHAEACTEES OF TRIBES AND GENEEA. 



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. 



ttt Fronds ivith yelloio farina on the under side. 

 C. aurautiaca (Car.), Hook. Ic. PI., t. dOi ; C. chryso- 

 phylla. Hook., Pil. Esot., t. 95, fig. 1. 



159.— Cassebeeea, Kaidf. (182-1). 

 Hooh. Sp. Fil. 



Vernation uniserial, sarmentum short. Fronds tripartite 

 or pinnate, 6 to 1 8 inches high, long stipate, stipes and 

 rachis smooth, castaneous ; pinnas oblong, 2 to 3 inches in 

 length, margin thick, emarginate. Veins internal, obscure, 

 forked, free. Sporangiferoiis recei-dacles terminal, puncti- 

 form, laterally connivent in pairs. Indusium inti-amarginal, 

 in short, linear pieces, each piece including the connivent 

 sporang-ia, forming oblong sori. 



Type. Adiantum triphyUum, Smith. 



Illust. Hook, and Bauer Gen. Fil., t. 66, A ; Moore Ind. 

 Fil., p. 27, B ; Hook. Syn. Fil., t. 3, fig. 26. 



Ob3. — This genus was originally faunded upon two Ferns, 

 natives of Brazil ; although not differing much in general 

 habit or in technical characters from PeJlcea, 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 

 Casseheera (see Ormopteris). 



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



