Yucca thompsoniana

(Thompson Yucca)

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Scientific Name Yucca thompsoniana USDA PLANTS Symbol YUTH
Common Name Thompson Yucca, Beaked Yucca ITIS Taxonomic Serial No. 43153
Family Asparagaceae (Asparagus) formwerly Agavaceaea SEINet
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Description Habitat: Desert habitat; rocky slopes and knolls, 650 to 4600 ft.
Plant: Solitary, erect, large, tree-like, usually single trunk up to 10 feet high, not including flower spike.
Leaves: Often asymmetrical rosette of 100 or more leaves radiating from the top of the trunk with drooping dead leaves below; thin, flexible, mostly linear leaves up to 18 inches long and 1/2-inch wide; yellow or brownish edges are hard ("corneous") and may be finely toothed, no fibers.
Inflorescence: A very large cluster of blossoms in a narrowly ellipsoidal panicle from 1-1/2 to 3 feet tall starting usually 4 to 8 inches above the leaves and with 20 to 34 branchlets; many hanging, globe- to bell-shaped flowers, white petals 1-1/2 to 2-1/2 inches long.
Bloom Period: April to May.
Fruit: Erect ellipsoidal capsule, 1-3/8 to 2-3/4 inches long and 3/4 to 1 inch across with a long twisted beak that flares when dry.
References: "Little Big Bend" by Roy Morey, "Manual of the Vascular Plants of Texas" by Correll and Johnston, and SEINet.
BONAP Distribution Map

Map Color Key
Texas Status:

Banner photo of Castilleja indivisa and Lupinus ssp. taken along FM 1323 north of Johnson City, Blanco County

© Tom Lebsack 2024