PLATE XLVI. 



A plant of Uncinia brevicaulis, var. gracilior, natural size. 



Figure 1. — A male flower with its a;lume. 

 „ 2. — A female flower with its glume. 

 ,, 3. — The same without the glume. 

 „ 4. — The same with the rhachilla and the lower part of the utricle: all enlarged. 



The plant figured was collected in Tristan da Cunha by MacGillivray and Milne, and 

 is preserved in Kew Herbarium. 



