Yucca baileyi

Wooton & Standley

Contr. U.S. Natl. Herb. 6: 114. 1913.

Common names: Alpine yucca
Synonyms: Yucca baileyi var. navajoa (J. M. Webber) J. M. Webber Yucca navajoa McKelvey Yucca standleyi
Treatment appears in FNA Volume 26. Treatment on page 435. Mentioned on page 426, 432, 436, 437.

Plants solitary or cespitose, forming colonies 1.3–2 m diam., acaulescent, erect or semierect, up to 0.2 m; rosettes usually small, symmetrical. Leaf blade yellowish green, plano-convex or plano-keeled, occasionally falcate, widest near middle, 25–45(–50) × 0.6–0.9 cm, rigid, smooth adaxially and abaxially, margins entire, recurved, filiferous, whitish, apex spinose, spine acicular, to 3.2 mm. Inflorescences racemose, arising within or just beyond rosettes, 2.5–4.5(–8.5) dm; bracts erect, purplish; peduncle scapelike, 0.1–0.2 m, less than 2.5 cm diam. Flowers pendent; perianth campanulate; tepals distinct, ovate to obovate or elliptic, 5–6.5 × 1.5–3.2 cm; filaments to 2 cm, finely pubescent; pistil green, 2.5–3.2 × 0.8 cm; style white, 7 mm; stigmas lobed. Fruits erect, capsular, dehiscent, oblong-cylindric, not usually constricted, 5 × 2.5 cm, dehiscence septicidal. Seeds dull black, thin, 6–10 mm.

Phenology: Flowering spring.
Habitat: Mountains, adjacent woodlands and grasslands
Elevation: 1300–2500 m


V26 899-distribution-map.jpg

Ariz., Colo., N.Mex., Utah.


Some populations of Yucca baileyi comprise compact colonies of semierect, branched plants instead of scattered, cespitose individuals. These populations were recognized as var. navajoa by J. M. Webber (1953), who noted that Y. baileyi possibly hybridizes with Y. glauca and Y. angustissima.

Selected References


Lower Taxa

... more about "Yucca baileyi"
William J. Hess +  and R. Laurie Robbins +
Wooton & Standley +
Alpine yucca +
Ariz. +, Colo. +, N.Mex. +  and Utah. +
1300–2500 m +
Mountains, adjacent woodlands and grasslands +
Flowering spring. +
Contr. U.S. Natl. Herb. +
Yucca baileyi var. navajoa +, Yucca navajoa +  and Yucca standleyi +
Yucca baileyi +
species +