Tree Yucca, St. Peter’s Palm
Tree yuccas are native to northeastern Mexico. They were first described by Benjamin Chabaud in 1876. Yuccas are rich in saponins, and have been used in the past as a substitute for soap. Here is a famous specimen from the Exotic Garden of Monaco.
Identification: Plants reach 33-46' (10-14 m) in height, and a diameter of up to 9½' (3 m). They typically begin to branch out at a height of 9½-13' (3-4 m). Like other yuccas, clusters of sharp rigid straplike leaves emerge from the plant tops, interspersed with tough curly thin white filaments. Leaves are blue-green in color, forming clusters up to 3' (91 cm) in diameter. Flower clusters 4-6' (1.2-1.8 m) long are covered with cream-colored flowers.
See the Yucca page for a comparison with other yuccas.
Edibility: The fruit is edible raw or cooked. Flowers are said to be delicious, and even the flowering stems may be cooked and eaten like asparagus.
Yucca filifera at the Encyclopedia of Stanford Trees, Shrubs and Vines
Yucca filifera on Plants for a Future, a resource and information centre for edible and otherwise useful plants
Yucca filifera on Desert-tropicals.com
Yucca filifera on Wikimedia Commons
Yucca filifera on SEINet—the Southwest Environmental Information Network
Yucca filifera description by Thomas H. Kent, last updated 2 Jan 2019.
Range: Zones 8-12: