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banana yucca, datil yucca, Spanish bayonet

pale yucca, twistleaf yucca

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.

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.

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.

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.

Seeds

dull black, obovate, 7–11 mm diam., 3 mm thick, rugose.

dull black, thin, 5–7 mm diam.

Yucca baccata

Yucca pallida

Phenology Flowering spring.
Habitat Rocky prairies and uplands, rarely limestone hills
Elevation 100–400 m (300–1300 ft)
Distribution
from USDA
North America; Mexico (Chihuahua, Sonora)
[WildflowerSearch map]
[BONAP county map]
from FNA
TX
[WildflowerSearch map]
[BONAP county map]
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.)

Key
1. Plants acaulescent or caulescent; stems 1–6, aerial or subterranean, shorter than 0.3 m; leaf margins coarse, curling.
var. baccata
1. Plants caulescent; stems 1–24, aerial, often branched, some reaching 2 m; leaf margins filiferous.
var. brevifolia
Source FNA vol. 26, p. 427. FNA vol. 26, p. 431.
Parent taxa Agavaceae > Yucca Agavaceae > Yucca
Sibling taxa
Y. aloifolia, Y. angustissima, Y. arkansana, Y. baileyi, Y. brevifolia, Y. campestris, Y. constricta, Y. elata, Y. faxoniana, Y. filamentosa, Y. flaccida, Y. glauca, Y. gloriosa, Y. harrimaniae, Y. intermedia, Y. madrensis, Y. necopina, Y. neomexicana, Y. pallida, Y. reverchonii, Y. rostrata, Y. rupicola, Y. schidigera, Y. tenuistyla, Y. thompsoniana, Y. treculeana, Y. utahensis
Y. aloifolia, Y. angustissima, Y. arkansana, Y. baccata, Y. baileyi, Y. brevifolia, Y. campestris, Y. constricta, Y. elata, Y. faxoniana, Y. filamentosa, Y. flaccida, Y. glauca, Y. gloriosa, Y. harrimaniae, Y. intermedia, Y. madrensis, Y. necopina, Y. neomexicana, Y. reverchonii, Y. rostrata, Y. rupicola, Y. schidigera, Y. tenuistyla, Y. thompsoniana, Y. treculeana, Y. utahensis
Subordinate taxa
Y. baccata var. baccata, Y. baccata var. brevifolia
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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