ECHINOCACTUS. 53 



Colorado and California. Under cultivation it thrives in a cool 

 house in winter, with as much sun and warmth as possible in spring 

 and summer. When wild it is often subjected to severe frosts and 

 heavy snowfalls during winter, while in summer the fierce heat of 

 the sun is such as to burn up nearly all vegetation. (Fig. 22.) 



E Orusoni. 



A handsome plant, with sturdy, globose stems usually about 

 a foot high. Ribs about twenty, almost hidden by the crowded 

 clusters of stout curved spines, 1 inch to 2 inches long, and of 

 a bright yellow colour. Flowers red and yellow. One of the moat 



Fig. 23. Echinocactus Grusonl. 



striking of the larger excessively spinous species. Large plants of 

 it have been sold in London under the name of E. avreus. 

 Mexico 1805. (Fig. 23.) 



E. Haselbergii. 



Stem globose, 3 inches high, tubercles small, convex, almost 

 vertically arranged, pale green, each crowned with a tuft of snow- 

 white hairs and a star of about twenty silvery spines, J inch or 

 less long. Flowers, red and yellow, H inches wide, composed 

 of about forty petals. Although long known in cultivation, 

 its habitat is unknown. It was figured in the Botanical Maga ine t 

 t. 7009, from a plant flowered at Kew in 1888. 



