| Noun | 1. | genus Yucca - tropical American plants with stiff lancelike leaves and spikes of white blossoms; sometimes considered a genus of Amaryllidaceae liliid monocot genus - genus of monocotyledonous plants comprising mostly herbs having usually petaloid sepals and petals and compound pistils Agavaceae, agave family, family Agavaceae, sisal family - chiefly tropical and xerophytic plants: includes Dracenaceae (Dracaenaceae); comprises plants that in some classifications are divided between the Amaryllidaceae and the Liliaceae yucca - any of several evergreen plants of the genus Yucca having usually tall stout stems and a terminal cluster of white flowers; warmer regions of North America |