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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.


Annual to shrub [tree]; sap clear or colored; monoecious or dioecious. Stem: spreading to erect. Leaf: cauline, alternate, entire in California; hairs generally stellate. Inflorescence: cyme, 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 1–3-chambered, styles 2-lobed, ± dissected, or simple. Fruit: spheric or 3-lobed, smooth or tubercled. Seed: smooth to ribbed or pitted; scar appendaged.
1200–1300 species: tropics, warm temperate, worldwide. (Greek: tick, for resemblance of seed) [Berry et al. 2005 Amer J Bot 92:1520–1534]

Key to Croton

1. Annual; monoecious; ovary 1-chambered, style 1, simple ..... C. setiger

1' Perennial herb to shrub; dioecious; ovary 3-chambered, styles 3, 2-lobed, lobes 2-forked

2. Seed 3.5–5.5 mm; pedicels in fruit 1–1.5(3) mm; staminate sepals ± 2–2.5 mm; Central Coast, South Coast, s Channel Islands, Desert ..... C. californicus

2' Seed 6.5–7 mm; pedicels in fruit 4–7 mm; staminate sepals 2.5–3 mm; se Sonoran Desert ..... C. wigginsii


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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