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Yucca is a genus of perennial shrubs and trees in the family Asparagaceae, subfamily Agavoideae. [2] Its 40–50 species are notable for their rosettes of evergreen, tough, sword-shaped leaves and large terminal panicles of white or whitish flowers.
Yucca angustissima is a low-lying species forming colonies of basal rosettes up to 3 m (10 feet) in diameter. Leaves are long and thin, up to 150 cm long but rarely more than 2 cm across. Leaves are long and thin, up to 150 cm long but rarely more than 2 cm across.
Yucca utahensis can reach a height of 10 feet (3 m), though it is usually much smaller. Stems are sometimes procumbent , often several per colony, forming colonies of several individuals. Leaves are narrow and needle-like, up to 70 cm long but rarely more than 2 cm wide, with fibers separating along the margins.
Yucca baccata is recognized by having leaves 50–76 cm (20–30 in) long [4] with a blue-green color, and short or nonexistent trunks. It flowers in the spring, starting in April to July depending on locality (altitude), and the flowers range from 5 to 13 cm (2 to 5 in) long, in six segments, [7] white to cream-coloured with purple shades.
Yucca glauca (syn. Yucca angustifolia) is a species of perennial evergreen plant, adapted to xeric (dry) growth conditions. It is also known as small soapweed, [3] soapweed yucca, Spanish bayonet, [4] and Great Plains yucca. Yucca glauca forms colonies of rosettes. Leaves are long and narrow, up to 60 cm long but rarely more than 12 mm across.
Yucca elata is a perennial plant, with common names that include soaptree, soaptree yucca, soapweed, and palmella. [3] [4] It is native to southwestern North America, in the Sonoran Desert and Chihuahuan Desert in the United States (western Texas, New Mexico, Arizona), southern Nevada, southwestern Utah, and northern Mexico (Chihuahua, Coahuila, Sonora, Nuevo León).
Yucca gigantea (syn. Yucca elephantipes) is a species of flowering plant in the asparagus family, native to Mexico and Central America.Growing up to 8–12 m (26–39 ft) in height, [3] it is an evergreen shrub which is widely cultivated as an ornamental garden or house plant, often referred to simply as yucca cane. [4]
Yucca arkansana is one of the smaller members of the genus Yucca, acaulescent or with a stem no more than 76 cm tall. Flowers are greenish-white, borne on a flowering stalk up to 180 cm (72 inches) tall. [6] [7] [8] A number of yucca moths lay their eggs upon Y. arkansana as a host plant, an example being Tegeticula intermedia. [9]