160 BRECK'S BOOK OF FLOWERS. 



hardy sorts. It is called Thready Yucca, from the long threads 

 that hang from the leaves. The flower-stem grows to the height 

 of five or six feet, and nearly the whole of it is covered with 

 jarge, bell-shaped, white flowers, sitting close ; all the species 

 are rather shy flowerers ; in August and September. 



Y. gloriosa and super ba are two splendid species, producing 

 an immense number of their fine bell-flowers on their tall stems. 

 The foliage of all the species is evergreen, and they closely re- 

 semble each other. The severity of our winters often blackens 

 the foliage ; to prevent this, the leaves should be gathered up 

 and tied together, and covered with straw. Propagated from 

 suckers. 



