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, shrub, tree, generally fleshy
Stem cylindric, spheric, or flat; surface smooth, tubercled, or ribbed (fluted); nodal areoles bear flowers, generally bear spines from center ("central spines") and margin ("radial spines") (Opuntia areoles bear small, barbed, deciduous bristles sometimes called glochids, generally also bear spines)
Leaf generally 0
Flower generally solitary, bisexual, sessile, ± radial; perianth parts generally many, grading from scale-like to petal-like; stamens many; ovary appearing inferior, ± submerged in stem, so generally with areoles on surface, style 1, stigma lobes generally many
Fruit generally fleshy, generally indehiscent, spiny, scaly, or smooth
Seeds many
Genera in family: 93 genera, ± 2000 species: especially Am deserts; many cultivated
Etymology: (Greek: thorny plant)
Reference: [Benson 1982 Cacti of US & Can; Hunt & Taylor eds 1990 Bradleya 8:85107]
Shrubs, trees; roots fibrous
Stem generally erect, < 12 m; segments flat to cylindric, generally firmly attached; tubercles generally elongate along stem; ribs sometimes present; spines 0many, sometimes flat, tip smooth or barbed, epidermis persistent or separating as a papery sheath; small, barbed deciduous bristles generally many
Leaf small, conic, fleshy, deciduous, obvious on young stems and ovaries
Fruit juicy, fleshy or dry; wall thick, bearing areoles
Seed dark brown, encased in a bony, whitish aril
Species in genus: 200 species: Am; O. ficus-indica cultivated for food, others for ornamental
Etymology: (Possibly from Papago Indian name ("opun") for this food plant; or named for a spiny plant of Opus, Greece)
Spines smaller, fewer in shade forms; when yellow, blacken with age.Hybridization common within subgenera.
Native |
Stem ± tree-like, 1.52 m; segments flat, 1320 cm, generally round; spines 38 in at least upper areoles, longest 2.55 cm, generally straight, flat, ± reflexed, translucent yellow
Flower: inner perianth 22.5 cm, yellow; filaments white; style white, stigma yellow-green
Fruit ± 4 cm, juicy; exterior purple-red; middle layer white, seed-pulp pink; areoles 4070
Seed 3 mm
Chromosomes: 2n=22
Ecology: Uncommon. Pinyon/juniper woodland, desert scrub edge, chaparral
Elevation: 6001300 m.
Bioregional distribution: e Peninsular Ranges, Desert Mountains
Distribution outside California: to Nevada, New Mexico, n Mexico
Flowering time: MayJun
Distinctive stabilized hybrids with O. phaeacantha in DMtns (New York Mtns, e San Bernardino Co.), s NV, w AZ have been called O. curvospina Griffiths (2n=44)
Horticultural information: DRN, DRY, SUN: 3, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20, 21, 22, 23, 24.