Yucca baccata |
Yucca pallida |
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banana yucca, datil yucca, Spanish bayonet |
pale yucca, twistleaf 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 forming loose colonies of rosettes, acaulescent, with branching subterranean caudices; rosettes 10–30 per colony, each rosette with fewer than 100 leaves. | ||||
Leaf | blade lanceolate, straight, flat except becoming concave near apex, widest above middle, 20–50 × 1–4.5 cm, flexible, glaucous, margins denticulate or sometimes wavy, yellow. |
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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. |
paniculate, often distally racemose, arising beyond rosettes, 7–12 dm, with wide-spreading branchlets 1.5–2.3 dm; bracts erect; peduncle scapelike, 0.6–1.3 m, less than 2.5 cm diam., glaucous. |
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Flowers | pendent; perianth campanulate; tepals distinct, greenish white, elliptic to ovate, 5–6.5 × 2–3.2 cm; filaments 1.8–3.2 cm; pistil 3.2–4 cm; style white, 13–20 mm; stigmas lobed. |
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Fruits | pendent, baccate, indehiscent, elongate, 5–23 × 4–7.5 cm, fleshy, succulent. |
erect, capsular, dehiscent, oblong-cylindric, 4.5–5.5 × 1.3–2 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 pallida |
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Phenology | Flowering spring. | |||||
Habitat | Rocky prairies and uplands, rarely limestone hills | |||||
Elevation | 100–400 m (300–1300 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 pallida is endemic to the blackland prairies of Texas and was originally included in Y. rupicola. J. M. Webber (1953) indicated that he found plants of Y. rupicola with key features similar to those of Y. pallida. Occasionally, plants with entire margins are found; these have been called Y. pallida var. edentata, which S. D. McKelvey (1938–1947) suggested might be a hybrid between Y. pallida and Y. arkansana. K. H. Clary (1997) indicated that DNA evidence confirms the close relationship of Y. pallida and Y. rupicola. (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 | ||||||
Synonyms | Y. pallida var. edentata, Y. rupicola var. edentata | |||||
Name authority | Torrey: in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 221. (1859) | McKelvey: Yuccas Southw. U.S. 2: 57, plates 13, 14. (1947) | ||||
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