Comments
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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.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
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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.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Distribution
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Tex.; Mexico (Chihuahua, Coahuila).
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Flowering/Fruiting
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Flowering late winter--spring.
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Habitat
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Rocky slopes, flat plains; 800--2100m.
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Synonym
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Samuela faxoniana Trelease; Yucca australis Trelease 1893, not (Engelmann) Trelease 1902; Y. macrocarpa Coville 1893, not Engelmann 1881
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA