Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



James R. Shevock

Perennial, shrubs, trees, very aromatic, sometimes thorny
Leaves generally alternate, simple to pinnately compound (sometimes reduced to spines), prominently oil-gland-dotted; stipules 0
Inflorescence: cyme, raceme, or flowers solitary, generally bracted
Flower generally bisexual, generally strongly aromatic; sepals generally 5, free or fused at base, generally persistent; petals generally 5, free or fused at base, generally whitish or greenish; stamens generally 2–4 X petal number; ovary generally superior, generally lobed, chambers generally 4–5, ovules generally many
Fruit: berry, drupe, winged achene, or capsule, generally aromatic
Seeds generally oily
Genera in family: ± 150 genera, ± 1500 species: especially tropical, warm temp, especially s Africa, Australia; used or cultivated for food (Citrus , 50 species), perfume, medicine, timber, ornamental (Choisya, Skimmia , etc.). Some TOXIC: oils may promote localized sunburn or produce dermatitis.



Shrub, small tree, generally with bisexual and pistillate flowers
Leaves pinnately compound; leaflets 3–5, ± sessile, entire to finely serrate
Inflorescence panicle-like
Flower: sepals 4–5; petals 4–5, greenish white; stamens 4–5, filaments hairy on inner side; ovary chambers 2, style short, stigmas 2
Fruit dry, indehiscent, ± flat, gland-dotted; wing prominent, round
Seeds 2
Species in genus: 3 species: US, Mex
Etymology: (Greek: elm, from similar fruit)


P. crenulata Greene

Plant generally < 5 m
Leaves deciduous; leaflets 3, 2–7 cm, lanceolate to obovate, glabrous above, ± hairy beneath; petiole 2–5 cm
Inflorescence ± flat-topped
Flower: sepals minute; petals 4–5 mm, fragrant
Fruit 1–2 cm, ± straw-colored; wing ± notched at both ends; style persistent
Ecology: Scrub, woodland
Elevation: generally < 700 m.
Bioregional distribution: Inner North Coast Ranges, Cascade Range Foothills, Sierra Nevada Foothills, San Francisco Bay Area
Horticultural information: 7, 14, 15, 16, 17; IRR: 8, 9, 18, 19, 20, 21, 22, 23, 24.

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