82 CACTUS CULTURE FOR AMATEURS. 



M. gr&cilis. 



Stem proliferous, 2 inches high, producing numerous branches 

 which fall off and take root. Tubercles small, green, crowded ; 

 spines in a stellate tuft, short, curved, pale yellow or white. Flowers 

 as in M. elongata, to which this species is closely allied. Grows well 

 in window cases, or on a shelf in a cool greenhouse. Mexico. 

 The variety pulchella has bright yellow spines. 



M. Grahami. 



Stern globose, 3 inches high, branching sometimes when old ; 

 tubercles 4 inch long, egg-shaped, corky when old, and persistent. 

 Spines about o inch long, in tufts of about twenty, all radiating 

 except one in the centre, which is hooked. Flowers bright red, 

 1 inch long, produced in a circle round the stem. Fruit a small, 

 oval berry, | inch long. Colorado Mountains. 



M. Haageana. 



Habit as shown in the figure, which is reduced to about one- 

 fourth the natural size. As the stem gets older, it becomes more 

 elongated. Tubercles four-sided, pointed at the top, The spines 



Fig. 39. Mamillaria Haageana. 



arranged in a star, with two central ones, which are longer, stiffer, 

 and much darker in colour. Flowers small, almost hidden beneath 

 the spines, bright carmine- rose ; produced on the upper part of the 

 stem in June. Mexico, 1835. (Fig. 39.) 



M. lasiacantha. 



A pretty little plant with depressed, spreading stems 1 inch 

 high, forming a dense tuft, the crowded, small tubercles hidden 

 by the numerous, spreading, radial, white, wool -like, feathered 

 spines, by which it is easily distinguished from M. Boca&ana, 



