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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Perennial herb, shrub, tree, fibrous succulent or not, from bulbs or rhizomes. Stem: above ground or not, branched or not. Leaf: simple, deciduous or not, basal or in terminal rosettes, generally sessile, linear, lanceolate, oblanceolate or ovate, fibrous or not, thin and flexible or thick and rigid or succulent; margin entire, fine-serrate, dentate, or with filaments, tips rigid or flexible, with a spine or not. Flower: bisexual; perianth parts 6, in 2 petal-like whorls, free or ± fused; stamens 6, ± fused to perianth, filaments often wide, succulent; ovary superior or inferior, chambers 3, style 1 (thick, poorly defined), stigma head-like or 3-lobed. Fruit: capsule, indehiscent, loculicidal, or septicidal. Seed: few to many, ± flat or ovoid, generally black.
23 genera, 637 species: worldwide. —Scientific Editors: Dale W. McNeal, Thomas J. Rosatti.
Key to Agavaceae
Shrub- or tree-like, generally branched from woody caudex, occasionally dying after fruiting. Leaf: rosette basal or at branch tips, 2–15 dm, linear, thick, ± rigid, stout-spine-tipped, bases ± expanded, margins generally curved up, entire or dentate, often fibrous-shredding. Inflorescence: panicle [raceme], erect (pendent), dense; peduncle generally < 2 cm wide; bracts generally ascending. Flower: generally pendent, 3–13 cm; perianth parts 6 in 2 whorls, generally ± fused, ± white, fleshy, waxy; stamens 6, filaments ± thick, fleshy; ovary superior, 3(6)-chambered, generally green, style short, often thick, poorly defined, stigmas 3-lobed, white to pale green. Fruit: berry-like or generally capsule, erect or pendent, tardily septicidal or generally indehiscent. Seed: ± many in 2 rows per chamber, often flat, black.Key to Yucca
± 40 species: eastern coastal plain, southeastern, sc, & especially dry southwestern North America; northern, central-western Mexico, northern Central America. (Haitian: yuca or manihot, because young inflorescences occasionally roasted for food) Pollinated at night by small moths while laying eggs in ovary. Yucca whipplei moved to Hesperoyucca.
Unabridged references: [Hess & Robbins 2002 FNANM 26: 423–439]
Plant 1–15 m. Stem: erect, above ground, generally branched above, rosettes at tips, well above ground. Leaf: 15–35 cm, 0.7–1.5 cm wide, dark green, expanded base 2–4 cm, 4–5 cm wide, ± white, margins minute-serrate, yellow. Inflorescence: 3–5 dm, distal generally ± 1/2 exserted from rosettes. Flower: erect; perianth 4–7 cm, ± bell-shaped, parts lanceolate to oblong, ± fused at base, cream to ± green; filaments thick; pistil ± 3.5 cm. Fruit: capsule, spreading to erect in age, 6–8.5 cm, ellipsoid, dry, spongy, or leathery in youth.
Desert flats, slopes; 400–2000 m. s High Sierra Nevada (e slope), Tehachapi Mountain Area, e East of Sierra Nevada, Mojave Desert; to southwestern Utah, western Arizona, southern Nevada. Growth form variable. Apr–May [Online Interchange]
Previous taxon: Yucca baccata var. baccata
Next taxon: Yucca schidigera
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Mar 10 2014
Citation for this treatment: [Author of taxon treatment] 2012. Yucca, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=48766, accessed on Mar 10 2014
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