Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



Edward F. Anderson (except Opuntia)

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 8:85–107]



Stem generally 1, 5–15 cm, 2–12 cm diam, ovoid to cylindric; ribs 8–21, prominent; tubercles distinct; central spines 1–11, straight or hooked; radial spines generally 3–30, 6–30 mm, straight
Flower 25–75 mm diam; perianth greenish yellow to magenta; ovary scaly
Fruit becoming dry, 6–25 mm, scaly
Seed reniform, tubercled, black
Species in genus: 19 species: sw US, Mex
Etymology: (Greek: hard cactus)


S. johnsonii (Engelm.) N.P. Taylor

Stems generally 1, 10–25 cm, 5–10 cm diam, ovoid to cylindric; ribs 17–21; spines yellow or pink to reddish, central 4–8, radial 9–10
Flower 5–8 cm diam, greenish yellow, pink, or magenta
Fruit 7–15 mm, 3–5 mm diam; scales widely cordate, ciliate
Chromosomes: 2n=22
Ecology: Granitic areas, creosote-bush scrub
Elevation: 500–1200 m.
Bioregional distribution: n Mojave Desert (Inyo Co.)
Distribution outside California: to sw Utah, nw Arizona
Flowering time: Apr–May
Synonyms: Echinocactus j. Engelm.; Neolloydia j. (Engelm.) L.D. Benson
Horticultural information: DRN, DRY, SUN; DFCLT.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for SCLEROCACTUS%20johnsonii being generated

Retrieve Jepson Interchange Index to Plant Names entry for Sclerocactus johnsonii
Retrieve dichotomous key for Sclerocactus
Retrieve multiple-entry key (MEKA) for Sclerocactus
Overlay Consortium of California Herbaria specimen data by county on this map
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