Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
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.



Grady L. Webster, except as specified

Annual, perennial herb, shrub, tree, vine, monoecious or dioecious
Stem generally branched, sometimes fleshy or spiny
Leaves generally simple, alternate or opposite, generally stipuled, petioled; blade entire, toothed, or palmately lobed
Inflorescence: cyme, panicle, raceme, spike; flowers sometimes in clusters (dense, enclosed by involucre, flower-like in Chamaesyce, Euphorbia ), terminal or axillary
Flower unisexual, ± radial; sepals generally 3–5, free or fused; petals generally 0; stamens 1–many, free or filaments fused; ovary superior, chambers 1–4, styles free or fused, simple or lobed
Fruit: generally capsule
Seeds 1–2 per chamber; seed scar appendage sometimes present, pad- to dome-like
Genera in family: 300 genera, 7500 species: ± worldwide especially tropical; some cultivated (Aleurites , tung oil; Euphorbia subsp.; Hevea , rubber; Ricinus )
Reference: [Webster 1967 J Arnold Arbor 48:303–430]
Many species ± highly TOXIC.


Annual, perennial herb, shrub, tree, monoecious or dioecious; sap clear or colored
Stems generally erect
Leaves generally simple, cauline, alternate; hairs generally stellate
Inflorescence: spike or raceme, generally terminal
Staminate flower generally pedicelled; sepals generally 5; petals 5 or 0; stamens 8–50(300), filaments free, bent inward in bud; nectar disk generally divided
Pistillate flower: pedicel short or 0, becoming longer in fruit; sepals generally 5, entire to lobed; petals generally 0; nectar disk entire; ovary 3-chambered, styles 2-lobed or toothed
Fruit spheric or 3-lobed, smooth or tubercled
Seeds 1 per chamber, smooth to ribbed or pitted; scar appendaged
Species in genus: 900–1000 species: tropical, warm temp, worldwide
Etymology: (Greek: from resemblance of seed to a tick)
Recent taxonomic note: This genus now considered to include Eremocarpus


C. californicus Muell. Arg.

Perennial or subshrub < 1 m, dioecious; hairs stellate, scale-like
Leaf: petiole 1–4 cm; blade 2–5.5 cm, elliptic to narrowly oblong, tip rounded to obtuse, margin entire
Inflorescence: raceme
Staminate flower: pedicels 1–5.5(7) mm; petals 0; stamens 10–15, filaments hairy
Pistillate flower: pedicel < or = 1 mm, 1–1.5(3) mm in fruit; sepals ± 2 mm, entire; styles 2-lobed, lobes 2-forked
Seed 3.5–5.5 mm, smooth
Ecology: Sandy soils, dunes, washes
Elevation: < 900 m.
Bioregional distribution: Central Coast, South Coast, s Channel Islands (Santa Catalina Island), Desert
Distribution outside California: Arizona, Baja California
Synonyms: vars. mohavensis A. Ferg. and tenuis (S. Watson) A. Ferg
Horticultural information: DRN: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24; DFCLT.

previous taxon | next taxon
bioregional map for CROTON%20californicus being generated

Retrieve Jepson Interchange Index to Plant Names entry for Croton californicus
Retrieve dichotomous key for Croton
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California