Yucca faxoniana


Man. Trees, 121. 1905.

Common names: Faxon yucca Spanish dagger
Basionym: Yucca australis Trelease 1893 Yucca macrocarpa Coville 1893
Synonyms: Samuela faxoniana Trelease
Treatment appears in FNA Volume 26. Treatment on page 427. Mentioned on page 424.

Plants solitary, erect, arborescent, 2.5–6.9 m, including inflorescence. Stems 1, simple or with 2–4 branches, to 5.1 m, average diam. 32 cm. Leaf blade erect, yellowish green, 43–115 × 3.1–8.4 cm, rigid, smooth, glabrous, margins conspicuous, curling, filiferous, brown. Inflorescences erect, paniculate, often with proximal branches arising beyond rosettes, broadly ovoid, 5.5–25.5 dm, glabrous; peduncle 0.3–0.6 m. Flowers pendent, 4.4–12.4 cm; perianth campanulate; tepals connate basally into floral cup 1–32 mm, white to greenish white, ovate, 3.9–10.8 cm; filaments averaging 2.2 cm from base of tepals, glabrous; anthers 1–6 mm; pistil 2.8–8 × 0.7 cm; ovary ca. 4.5–5 times longer than wide; style 4.5 mm; stigmas distinct. Fruits pendent, baccate, indehiscent, elongate, 3.6–13.6 × 1.8–3.6 cm, fleshy, succulent. Seeds black, 7.7 mm diam., 2.9 mm thick, smooth.

Phenology: Flowering late winter–spring.
Habitat: Rocky slopes, flat plains
Elevation: 800–2100 m


V26 872-distribution-map.jpg

Tex., Mexico (Chihuahua, Coahuila).


Trelease described the genus Samuela based on two species, Samuela faxoniana and S. carnerosana. K. H. Clary’s DNA study (1997) shows them to be closely related but genetically distinct.

Yucca faxoniana is often used for landscaping in arid and semiarid regions of Texas and New Mexico.

Selected References


Lower Taxa

... more about "Yucca faxoniana"
William J. Hess +  and R. Laurie Robbins +
Sargent +
Yucca australis +  and Yucca macrocarpa +
Faxon yucca +  and Spanish dagger +
Tex. +, Mexico (Chihuahua +  and Coahuila). +
800–2100 m +
Rocky slopes, flat plains +
Flowering late winter–spring. +
Man. Trees, +
Samuela faxoniana +
Yucca faxoniana +
species +