Yucca gloriosa is a species of flowering plant in the family Asparagaceae, native to the southeastern United States. Growing to , it is an evergreen shrub. It is widely cultivated as an ornamental for its architectural qualities, and has reportedly become established in warmer climates in the wild in various parts of the world. Names Common names include:- Adam's needle glorious yucca lord's candlestick mound lily moundlily yucca palm lily Roman candle Sea Islands yucca soft-tipped yucca Spanish bayonet Spanish-dagger tree lily Description Yucca gloriosa is caulescent, usually with several stems arising from the base, the base thickening in adult specimens. The long narrow leaves are straight and very stiff, growing to long and wide. They are dark green with entire margins, smooth, rarely finely denticulate, acuminate, with a sharp brown terminal spine. The inflorescence is a panicle up to long, of bell-shaped white flowers, sometimes tinged purple or red. The fruit is a leathery, elongate berry up to long. Habitat Yucca gloriosa grows on exposed sand dunes along the coast and barrier islands of the subtropical southeastern USA, often together with Yucca aloifolia and a variety formerly called Yucca recurvifolia or Y. gloriosa var. recurvifolia, now Y. gloriosa var. tristis. In contrast to Y. gloriosa var. tristis, the leaves of Y. gloriosa var. gloriosa are hard stiff, erect and narrower. On the other hand, Y. aloifolia has leaves with denticulate margins and a sharp-pointed, terminal spine. Distribution Yucca gloriosa is native to the coast and barrier islands of southeastern North America, growing on sand dunes. It ranges from extreme southeastern Virginia south to northern Florida in the United States. It is associated with Yucca filamentosa, Yucca aloifolia, and Opuntia species. Cultivation The plant is widely cultivated in warm temperate and subtropical climates, and valued as an architectural focal point. It has reportedly escaped from cultivation and naturalised in Italy, Turkey, Mauritius, Réunion, Guam, the Northern Mariana Islands, Puerto Rico, Argentina, Chile and Uruguay. In landscape use, little maintenance is needed other than the removal of dead leaves when the shrub nears its ultimate height. The plant is very hardy, without leaf damage at , and can handle brief snow and freezing temperatures, as well as long periods of drought. Yucca gloriosa, and the cultivars 'Variegata' and = ‘Walbristar’ have gained the Royal Horticultural Society's Award of Garden Merit. Properties Yucca gloriosa has been known to cause skin irritation and