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Key to families | Table of families and genera

Previous taxon Indexes to all accepted names and synonyms:
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Lindsay P. Woodruff & James R. Shevock, except as noted

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.
± 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). Some TOXIC: oils may cause sunburn or dermatitis. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Rutaceae


Lindsay P. Woodruff

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.
12 species: southwestern United States, northern Mexico, southern Arabia to southern Africa. (Greek: bush odor)

T. montana Torr. & Frém.
Stem: 3–6 dm, broom-like, ± yellow-green, densely gland-dotted, generally leafless. Leaf: simple, 0.5–1.5 cm. Flower: sepals ± 2 mm, ovate, ± green; petals 8–12 mm, elliptic, dark purple, tips reflexed; ovary stalked, ovules 3–8 per chamber, style well-exserted. Fruit: lobes ± 5 mm wide, ± spheric. Seed: 1–4 per chamber, ± 4 mm, reniform, ± smooth, ± brown.
Dry slopes, washes, mesa tops; < 2100 m. Peninsular Ranges, Desert; to Utah, Arizona, Mexico. Feb–May [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Apr 1 2015
Citation for this treatment: [Author of taxon treatment] 2013. Thamnosma, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Apr 1 2015

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click for enlargement Thamnosma montana
See CalPhotos for additional images
2005 Michelle Cloud-Hughes

Geographic subdivisions indicated for the distribution of Thamnosma montana Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.