Yucca baccata |
Yucca reverchonii |
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banana yucca, datil yucca, Spanish bayonet |
San Angelo yucca |
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Habit | Plants often forming open colonies of rosettes, acaulescent or short-caulescent, shorter than 2.5 m. Stems, if present, decumbent, 1–24, aerial or subterranean, simple or sometimes branched, to 2 m. Leaf blade erect, bluish green, concavo-convex, 30–100 × 2–6 cm, rigid, scabrous or glaucous, margins brown. | Plants solitary or forming dense, open colonies of rosettes, acaulescent, with branching subterranean caudices; rosettes 2–10 per colony, each rosette with fewer than 100 leaves. | ||||
Leaf | blade lanceolate, straight, slightly concave, nearly flattened, widest at middle, 25–60 × 1–2(–2.5) cm, rigid, slightly glaucous, margins denticulate, yellow or reddish brown, hyaline. |
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Inflorescences | erect, paniculate, dense, arising completely within to mostly extending beyond rosettes, ovoid, 6–8.2 dm, glabrous, rarely slightly pubescent; peduncle scapelike, to 0.8 m. Flowers pendent, 5–13 cm, nearly as wide; perianth campanulate; tepals connate basally to form shallow floral cup 7–12 mm, usually cream-colored, occasionally tinged with purple, 4.5–13 cm; filaments connate proximally into collarlike structure, 3.2–12 mm, fleshy, pubescent; anthers 5–7 mm; pistil 4.5–8 × 0.7–1.2 cm (usually 4–5(–7) times longer than broad); ovary 0.7–1.2 cm; style 5–7 mm; stigmas distinct. |
narrowly paniculate, arising beyond rosettes, narrowly ovoid, 3.5–10 dm, densely pubescent; bracts erect; peduncle sometimes scapelike, 0.5–1.1 m, less than 2.5 cm diam. |
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Flowers | pendent; perianth campanulate; tepals distinct, white or greenish white, ovate, 4–6 × 1.5–3 cm, apex sharply acuminate; filaments 1.8–3.2 cm; pistil 3–4.5 cm × 4–6 mm; style white or greenish, 10–20 mm; stigmas lobed. |
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Fruits | pendent, baccate, indehiscent, elongate, 5–23 × 4–7.5 cm, fleshy, succulent. |
erect, capsular, dehiscent, ellipsoid, 4–6 × 1.8–3.2 cm, dehiscence septicidal. |
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Seeds | dull black, obovate, 7–11 mm diam., 3 mm thick, rugose. |
dull black, thin, 5–7 mm diam. |
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Yucca baccata |
Yucca reverchonii |
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Phenology | Flowering late spring. | |||||
Habitat | Rocky hillsides, limestone ledges, gravelly plains with dense brush | |||||
Elevation | 400–900 m (1300–3000 ft) | |||||
Distribution |
North America; Mexico (Chihuahua, Sonora)
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TX |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Yucca reverchonii is endemic to the Edwards Plateau. J. M. Webber (1953) reported apparent hybrids of this species with Y. rupicola and Y. thompsoniana. S. D. McKelvey (1938–1947) indicated that Y. reverchonii occupies an area of the Plateau between those of Y. rupicola and Y. thompsoniana. K. H. Clary (1997) presented DNA evidence that confirms a close relationship among these three species as distinct entities. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 26, p. 427. | FNA vol. 26, p. 431. | ||||
Parent taxa | Agavaceae > Yucca | Agavaceae > Yucca | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Torrey: in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 221. (1859) | Trelease: Rep. (Annual) Missouri Bot. Gard. 22: 102, plate 108. (1911) | ||||
Web links |