XANTHORHIZA, Ranunculaceae. Yellow-root. A spreading 
shrub about two feet high with small purplish-brown flowers 
in drooping racemes. After flowering, handsome pinnate leaves 
appear. This shrub makes a luxuriant growth when given a 
semi-shaded position [nursery]. 
X. simplicissima (Zanthorrhiza apiifolia). N. Y. to Fla. and Ky. 
YUCCA, Liliaceae. Yucca. Plants of tropical appearance that 
have sword-like leaves arranged in dense rosettes. Their tall 
branching stalks bear white flowers which are very ornamental. 
In a well drained soil they thrive and can withstand an appre¬ 
ciable amount of dryness [ 5 E, nursery]. 
Y. filamentosa. Adam’s Needle; S. C. to Miss, and Fla. (Jy.-Au.). 
Y. /. variegata. 
Y. glauca. S. D. to N. Mex. (Jy.-Au.). 
ZANTHOXYLUM, Rutaceae. Prickly aromatic shrubs with 
handsome pinnate leaves and glossy black seeds. They bear flat 
inflorescences of many small white blossoms [ 6 E, nursery]. 
Z. schinifolium. E. China, Korea, Japan. 
Z. setosum. China. 
Z. simulans. N. and C. China. 
ZELKOVA, Ulmaceae. A graceful tree with ascending wide- 
spreading branches and a smooth-barked trunk; allied to the 
elms [iG]. 
Z. serrata. Japan. 
ZENOBIA, Ericaceae. A shrub that prefers acid soil and when 
favored by a sheltered position bears beautiful lily-of-the- 
valley-like flowers [nursery]. 
Z. pulverulenta. N. C. to Fla. (My.-Jn.). 
Z. P. NUDA. 
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