|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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
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.
Stem generally tree-like, 22.5 m; segments flat, 1625 cm, generally round; spines 513 in nearly all areoles, flat, longest 22.5(5) cm, rigid, generally curved, reflexed, translucent yellow
Flower: inner perianth yellow; filaments orange-yellow; style red, stigma green
Fruit 3.76 cm, juicy, spheric; exterior purple-red; interior white-yellow; seed-pulp generally red; areoles 2363
Seed 3.54 mm
Ecology: Coastal-sage scrub, chaparral
Elevation: 3450 m.
Bioregional distribution: South Coast, Channel Islands, Western Transverse Ranges, w Peninsular Ranges
Distribution outside California: Baja California
[not O. littoralis Engelm.] O. demissa Griffiths could be a hybrid with this sp. as one parent
Horticultural information: DRN, DRY: 14, 19, 20, 21, 22, 23 &SUN: 16, 17, 24.