THE NURSER Y LIST. 285 



Yucca (Adam's Needle, Bear's Grass, Spanish Bayonet). Lil- 



iacece. 



Increased by seeds ; and by divisions, which may be 

 planted in the open ground, or by pieces of thick, fleshy 

 roots, cut into lengths, and inserted in sandy soil, in heat. 



Yulan. See Magnolia. 

 Zamia. Cycadacece. 



Division of the crowns when possible ; or by seeds and 



suckers. The plants are oftenest imported directly from 



the tropics. 



Zanthoriza. See Xanthoriza. 

 Zanthoxylum (Prickly Ash). Rutacece. 



Seeds, suckers, but more often by root-cuttings. 



Zea. See Maize. 



Zfephyranthes, including Habranthus (Flower of the West 

 Wind, Zephyr Flower). Amaryllidece. 



May be multiplied by seeds ; or by separating the bulbels. 

 Zingiber, including Zerumbet (Ginger). Scitaminecc. 



Propagated by division. 

 Zinnia (Youth-and-old-Age). Composites. 



Seeds, sown either in-dooro or out. 

 Zizania (Wild or Indian Rice). Gramince. 



Seeds, sown along water courses or, in bogs in fall or 

 spring. 



Zizyphus. See Jujube. 



Zygadenus, including Amianthemum, Anticloa. Liliacece. 



Readily multiplied by seeds or by divisions. 

 Zygopetalum. Or chide ce. 



Division. (See also under Orchids.) 

 Zygophyllum (Bean Caper). Zygophyllecc, 



Seeds, when they can be had ; otherwise by cuttings in a 

 frame. 



