Xanthorrhœa (Black Boy, Grass-tree). Juncaceæ.
Seeds; but usually by offsets.
Xanthosoma, including Acontias. Aroideæ.
May be increased by cutting up the stem or root-stock into small pieces and planting these in light soil, or cocoa fibre, in bottom heat. After a stem has been cut off, a number of shoots are developed, which can be treated as cuttings.
Xerophyllum. Liliaceæ.
May be propagated by seeds and by divisions.
Xiphion. See [Iris].
Xylophylla. See [Phyllanthus].
Yam. See [Dioscorea].
Yellow-wood. See [Cladrastis].