TREATMENT FROM THE JEPSON MANUAL (1993) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY |
Perennial to trees, from membranous bulb, fibrous corm, scaly rhizome, or erect caudex
Stem generally underground
Leaves generally basal, often withering early, alternate, generally ± linear
Inflorescence various, generally bracted
Flower generally bisexual, generally radial; perianth often showy, segments generally 6 in two petal-like whorls (outer sometimes sepal-like), free or fused at base; stamens 6 (or 3 + generally 3 ± petal-like staminodes), filaments sometimes attached to perianth or fused into a tube or crown; ovary superior or inferior, chambers 3, placentas generally axile, style generally 1, stigmas generally 3
Fruit: generally capsule, loculicidal or septicidal (berry or nut)
Genera in family: ± 300 genera, 4600 species: especially ± dry temp and subtropical; many cultivated for ornamental or food;some TOXIC . Here includes genera sometimes treated in Agavaceae, Amaryllidaceae, and other families.
Subshrub or tree-like, sometimes dying after fruit
Leaves rosetted (basal or elevated on branches), 215 dm, linear, stiff, sword-like, stoutly spine-tipped; bases ± expanded; edges generally curved up
Inflorescence: panicle, dense; flowers pendent
Flower 213 cm; perianth parts 6 in 2 petal-like whorls, generally ± fused, ± white, fleshy, waxy; stamens 6, filaments ± thick, fleshy; ovary superior, style short, stigma 3-lobed, concave or dome-like
Fruit: generally capsule
Seeds ± many in 2 rows per chamber, black, often flat
Species in genus: ± 40 species: especially dry sw North America
Etymology: (Haitian: yuca, or manihot, because young inflorescences sometimes roasted for food)
Pollinated at night by small moths that simultaneously lay eggs in ovary.
Native |
Stems ± 0 aboveground; rosettes ± open, solitary or in small clumps
Leaf 5075 cm, ± dark green; expanded base ± 10 cm, 5 cm wide, reddish; margins strongly fibrous-shredding
Inflorescence 68 dm, heavy, purple-tinged; peduncle < 2 dm
Flower: perianth 513 cm, bell-shaped, reddish brown outside, ± white inside, segments lanceolate (outer narrower), fused below; pistil 58 cm
Fruit 1517 cm, fleshy when young, eventually pendent
Ecology: Uncommon. Dry Joshua-tree woodland
Elevation: 8001300 m.
Bioregional distribution: eastern Desert Mountains
Distribution outside California: to Utah, Texas
Flowering time: MayJun
Synonyms: var. vespertina McKelvey
Reported to hybridize with Y. schidigera
Horticultural information: DRN, SUN, DRY: 2, 3, 7, 8, 9, 10, 11, 14, 15, 16, 18, 19, 20, 21, 22, 23.