XXVIl] 



ODONTOPTERIS 



553 



Fronds large, bipimiate or tripinnate, the main rachis, which may be 

 dichotomously branched, bears long linear pinnae with broadly linear or 

 deltoid pinnules, acute or bluut, attached by the whole of the base ; the 

 lower margin of the lamina, which is usually entire and rarely lobed (e.g. 



FiQ. 364. A. Alethopteris lonchitica (Schloth.). i nat. size. 



B. Mariopteris muricata (Schloth.). x '1. 



C. Odoixtopteris ci. alpina (VresX). i nat. size. 



D. 0. of. alpina. Portion of pinna enlarged. 



(A— D. From photographs by Dr Kidston.) 



