66 



CACTUS CULTURE FOR AMATEURS. 



and flower more freely than if kept permanently under glass. 



(Fig. 32.) 



E. P. longispinus. 



A long-spined form, differing also in the shape of the stem, which 

 is oblong, rather than globose. 



Fig. 32. Echlnopsis Pent! an di. 

 E. tubiflorus. 



Stem orange-shaped, about 4 inches high, divided into about 

 twelve prominent, sharp- angled ridges, along which are tufts of 

 blackish spines, k inch long, and set in little cushions of white wool. 

 The flower tube is green, with scale-like bracts fringed with silky 

 black hairs about 6 inches long, and the spread of the petals over 

 4 inches, pure white, recurved, stamens arranged in a ring, about 

 the small, rayed stigma. Native of Mexico ; introduced about fifty 

 years ago. 



