Some Notes on Echinocadus . 



69 



this particular species makes it command a hi_o-her price than 

 many others, and it was only recently that I learned whence the 

 trade was supplied. As they are collected near the original 

 locality cited for it, no blame can attach to those who endeavor 

 to supply the demand, but I must consider it merely a 'trade 

 name' for a form differino- in no essential character from other 

 plants yearly sent out under this, the preceding and the following 

 names. 



Echinocactus Wislizeni, Engelm., is the oldest name applied 

 to any of these lorms of cacti. Some of the plants received un- 

 der this name are beautiful, with white spines like those of E. 

 cylindraceus; others have exceedingly handsome red spines; 

 still others have dull spines of no special color. In young plants 

 especially the color of the spines is very variable. 



Echinocactus Emoryi is the last of our Californian species to 

 receive notice. It more nearly approaches the two first men- 

 tioned species, the reddish spines and flowers being usuallv the 

 most characteristic features. But along with the red-spined and 



ECHINOCACTUS OKCUTTI. 



