ZINNIA. 457 



shaped, and hang downward; they are white within, but 

 on the outside each petal has a stripe of purple ; they 

 appear in August and September. 



The Aloe-leaved Yucca is a native of South America : 

 it produces a greater abundance of flowers than the former 

 kind ; white on the inside, purple without. 



The Drooping-leaved Yucca has white flowers, but its 

 scent is not agreeable. 



The Thready Yucca, so called from long threads which 

 hang from the sides of the leaves, is a native of North 

 America. The flower-stem of this plant grows to the 

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

 covered with large white flowers, sitting close. But, like 

 the other kinds, this plant flowers but seldom. 



It is said that, about the middle of the seventeenth cen- 

 tury, Mr. Walker possessed abundance of these plants in 

 his suburban garden in the village of St. James. " But," 

 says Mr. Morison, who mentions the circumstance, " I 

 never saw it flower there." 



These plants are to be treated as hardy Aloes. 



ZINNIA. 



CORYMBIFERJE. SYNGENESIA POLYGAMIA SUPERFLUA. 



So named by Linnaeus, in honour of J. G. Zinn, pupil of Haller, 

 and professor of botany at Gottingen after him. 



THE Zinnias are annual plants, bearing handsome 

 flowers : they are usually raised in a hot-bed ; but a warm 

 inhabited room will generally bring them forward as well. 

 The Yellow Zinnia is the most tender ; and this will pro- 

 duce but few flowers, unless it is stinted in its growth 

 while young, by confining the roots in a small pot. It is 

 a Peruvian. 



