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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.



Robert E. Preston & Elizabeth McClintock

Shrub, tree; generally dioecious. Stem: occasionally thorny; bark often bitter. Leaf: generally alternate, simple, entire, or pinnately compound, leaflets subentire to toothed near base. Inflorescence: panicle, raceme, or flowers 1. Flower: unisexual, inconspicuous; sepals generally 4–5, generally fused at base, generally erect; petals generally 5, free, generally spreading; stamens generally 10, generally on disk, filaments often with a basal scale; pistils 1–8, ovaries superior, 1–2-chambered, 1-ovuled [if pistil 1, chambers generally 2–5, 1-ovuled], styles free or partly fused. Fruit: winged achenes or drupes [berry, nut], in clusters [not].
22 genera, 100 species: tropics, warm temperate; some cultivated. [Clayton et al. 2007 Int J Plant Sci 168:1325–1339] Bark, leaves used traditionally to treat malaria, other ailments. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Brizicky 1962 J Arnold Arbor 43:173–186; Fernando & Quinn 1995 Taxon 44:177–181]

Key to Simaroubaceae

1. Tree, unarmed; leaf 30–90 cm, pinnately compound, leaflets with 2–4 teeth near base; fruit a winged achene ..... AILANTHUS

1' Shrub, small tree, thorns large; leaf 1–1.5 cm, simple, entire; fruit a drupe ..... CASTELA


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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