YAM, Chinese. See Dioscorea batatas. 

 Yarrow. See Achillea. 



Yellow-eyed Grass. See Xyris. 



Yellow Lily. See Hemerocallis. 



Yellow Pond-Lily. See Nuphar. 



Yellow-root. See Xanthorhiza. 



Yellow Sultan. See Centaurea suaveolens. 



Yew. See Taxus. 



Yucca. Adam's Needle. [Liliacese.] Fine exotic-looking 

 shrubs, some of them hardy ; others require some amount 

 of protection. They are aloe-like, with narrow leaves, some 

 growing up with an erect stem, which, in time, becomes 

 forked ; and others being almost stemless, the leaves grow- 

 ing close to the ground. The flowering stem in all is erect, 

 bearing a close panicle of large cream-colored, drooping, 

 tulip-like blossoms. They all grow in loamy soil, and the 

 hardy kinds have a fine effect planted sparingly in promi- 

 nent positions on rock-work. 



Y. aloifolia (aloe-leaved) ; half-hardy evergreen shrub ; 3 feet ; 

 flowers greenish-white, in August ; South America ; 1696. Y. an- 

 gustifolia (narrow-leaved) ; half-hardy evergreen shrub ; 2 feet ; 

 flowers greenish-white, in July; Missouri; 1811. Y. Draconis 

 (dragon) ; half-hardy evergreen shrub ; 6 feet ; flowers white, in 

 August; South America ; 1732. Y.filamentosa {\\\XQ.2L&f)\ hardy 

 evergreen shrub ; 2 feet ; flowers greenish-white, in September; 

 Virginia; 1675. K ^/^?^^^j-^^;^i- (glaucous) ; half-hardy evergreen 

 perennial ; 2 feet ; flowers white, in July; North America ; 18 19. 



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