148 JOURNAL OF THE ROYAL ORTICULTURAL SOCIETY. 



Boezlii (fig. 76) produces flowers which, when held up to the light, are most 

 richly coloured. This photograph was taken from probably the finest 

 specimen'in cultivation, grown by Herr Otto Froebel, of Ziirich. There 

 are probably nearly 400 species of Pleurothallis known to science, natives 

 of the mountains of Tropical America at a considerable elevation. The 



flowers of most of them are " inconspicuous," but many are of singular 

 form and gem-like beauty (figs. 77 and 78). 



The genus Restrepia is very closely allied to Pleurothallis, but it is 

 distinguished by having four pollen masses, the latter having but two. 

 Bestrepia antennifera is the largest of the species known. It was 



