Yew. See [Taxus].
Yucca (Adam’s Needle, Bear’s Grass, Spanish Bayonet). Liliaceæ.
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. Cycadaceæ.
Division of the crowns when possible; or by seeds and suckers. The plants are oftenest imported directly from the tropics.
Zanthorhiza. See [Xanthorhiza].
Zanthoxylum (Prickly Ash). Rutaceæ.
Seeds, suckers, but more often by root-cuttings.