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]
Stems 1200, generally in ± 50 cm clumps, each 215 cm, 215 cm diam, ± depressed to cylindric; ribs inconspicuous; tubercles grooved on upper surface from areole to base; central spines straight, ± following tubercle axis; radial spines wide-spreading ± in 1 plane from tubercle tip
Flower 13(6) cm diam; outer perianth parts ciliate
Fruit becoming dry, spheric to club-shaped, red or green; perianth persistent
Seed reniform, black or brown, pitted
Species in genus: 16 species: w US, Mex
Etymology: (R. & N. Escobar, Mexico)
Reference: [Taylor 1986 Cact Succ J Gr Brit 4:3644]
Native |
Stem 215 cm, 215 cm diam; tubercles 69 mm; spines dense, central spines 312, white, tip darker; radial spines 1240, 925 mm, straight, white
Flower 2.55 cm diam, straw-yellow, yellow-green, pink, magenta, to purplish
Fruit 1225 mm, elliptic in outline, green, sometimes with a few scales
Ecology: Sandy to rocky soils
Elevation: 752700 m.
Bioregional distribution: Desert
Distribution outside California: to Utah, Arizona, Mexico
Synonyms: Coryphantha v. (Nutt.) Britton & Rose; Mammillaria v. (Nutt.) Haw
Native |
Stems 1several, 718 cm, 715 cm diam, ovoid-spheric; central spines 1012; radial spines 1218
Flower 35 cm diam, magenta to purplish
Chromosomes: 2n=22
Ecology: Limestone slopes, hills
Elevation: 15002700 m.
Bioregional distribution: Desert Mountains (ne San Bernardino Co.)
Distribution outside California: s Nevada, nw Arizona
Synonyms: Coryphantha v. var. r. (Clokey) L.D. Benson
Threatened by collecting
Horticultural information: In cultivation.