Jepson eFlora: Taxon page
Vascular Plants of California
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Higher Taxonomy
Family: RutaceaeView DescriptionDichotomous Key

Common Name: RUE FAMILY
Habit: Perennial herb, shrub, tree, strongly aromatic, occasionally thorny. Leaf: generally alternate, simple or compound, dotted with minute, translucent glands; stipules 0. Inflorescence: cyme, raceme, or flowers 1, generally bracted. Flower: generally bisexual; sepals, petals each 4 or 5, free or fused at base; sepals generally persistent; petals generally +- white or +- green; stamens generally 2--4 × petal number; ovary superior, generally lobed, chambers 1--5, ovules 1--several per chamber. Fruit: berry, drupe, winged achene, or capsule. Seed: generally oily.
Genera In Family: +- 158 genera, +- 1900 species: especially tropics, warm temperate, especially southern Africa, Australia; used or cultivated for food (Citrus, 20--25 species), perfume, medicine, timber, ornamental (Choisya, Skimmia, etc). Toxicity: Some TOXIC: oils may cause sunburn or dermatitis.
eFlora Treatment Author: Lindsay P. Woodruff & James R. Shevock, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Habit: Subshrub or shrub. Leaf: simple or divided into 3 segments, alternate, minute, seasonally deciduous. Inflorescence: panicle (raceme-like or flowers scattered along stems). Flower: bisexual; sepals 4, fused at base, persistent; petals 4, erect in flower; stamens 8, in 2 series; ovary stalked or sessile, 2-lobed, style thread-like. Fruit: capsule, opening at tip, 2-lobed, leathery. Seed: 1--11 per chamber, +- smooth or tubercled.
Species In Genus: 12 species: southwestern United States, northern Mexico, southern Arabia to southern Africa. Etymology: (Greek: bush odor)
Jepson eFlora Author: Lindsay P. Woodruff
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

Previous taxon: Ruta chalepensis
Next taxon: Thamnosma montana

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Citation for this treatment: Lindsay P. Woodruff 2012, Thamnosma, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on December 07, 2023.

Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora,, accessed on December 07, 2023.