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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


Michael A. Vincent & James R. Shevock

Shrub, small tree, flowers generally bisexual and pistillate. Leaf: pinnately compound; leaflets 3–5, ± sessile, entire to finely serrate. Inflorescence: panicle-like. Flower: sepals 4–5; petals 4–5, entire, ± green-white; stamens 4–5, filaments hairy on inner side; ovary chambers 2, style short, stigmas 2. Fruit: achene, ± flat, round, gland-dotted, winged. Seed: 2.
3 species: United States, Mexico. (Greek: elm, from similar fruit)

P. crenulata Greene
Plant generally < 5 m. Leaf: deciduous; petiole 2–5 cm; leaflets 3, 2–7 cm, lanceolate to obovate, glabrous adaxially, ± hairy abaxially. Inflorescence: ± flat-topped. Flower: sepals minute; petals 4–5 mm, fragrant. Fruit: 1–2 cm, ± straw-colored; wing generally ± notched at tip, base; style persistent.
Scrub, woodland; generally < 1050 m. Klamath Ranges, Inner North Coast Ranges, Cascade Range, Sierra Nevada Foothills, Sacramento Valley (Sutter Buttes), San Joaquin Valley, San Francisco Bay Area, Peninsular Ranges. Apr–May [Online Interchange]

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Next taxon: Ruta


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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 26 2015
Citation for this treatment: [Author of taxon treatment] 2013. Ptelea, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 26 2015

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Geographic subdivisions indicated for the distribution of Ptelea crenulata 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).

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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.