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12. Rhus Linnaeus, Sp. Pl. 1: 265. 1753.
盐麸木属 yan fu mu shu
Deciduous shrubs or trees, polygamous or dioecious. Leaves imparipinnately compound; leaf rachis sometimes winged; leaflets petiolate or sessile, with serrate or entire margin. Inflorescence terminal, paniculate or thyrsoid, floral subtending bracts persistent or deciduous. Flowers functionally unisexual or bisexual, 5-merous. Ovary 1-locular and 1-ovulate; styles 3, often united basally. Drupe globose, slightly compressed, mixed glandular pubescent and pilose, red at maturity; exocarp and mesocarp united; mesocarp glutinous, red.
About 250 species: subtropical and warm temperate regions of the world; six species (four endemic) in China.
Species in this genus are the hosts of gall-producing insects such as aphids. The galls of Rhus chinensis (角倍 "jiao bei") are particularly sought after for medicinal purposes. Other species in the genus also deliver galls (肚倍 "du bei"), but these are considered to be of an inferior quality.
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| 1 |
Leaflet margin dentate; male inflorescences more than 25 cm. |
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1 R. chinensis |
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Leaflet margin entire or serrulate; inflorescences less than 20 cm |
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(2) |
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| 2 (1) |
Rachis broadly winged |
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(3) |
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Rachis not winged or narrowly so distally |
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(4) |
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| 3 (2) |
Leaflets ovate or oblong, with rounded apex, adaxially strigose, abaxially mixed hispid and minutely papillate. |
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2 R. wilsonii |
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Leaflets lanceolate, with acute or retuse apex, adaxially sparsely glandular-papillate and minutely pubescent along midrib, abaxially glaucous, glandular-papillate along midrib. |
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3 R. teniana |
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| 4 (2) |
Leaflets 9-17, abaxially white tomentose. |
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4 R. hypoleuca |
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Leaflets 7-13, abaxially usually minutely pubescent along midrib |
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(5) |
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| 5 (4) |
Branchlets ± pubescent; leaflets sessile, ovate to oblong, base rounded or subcordate, apex usually long acuminate. |
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5 R. punjabensis |
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Branchlets glabrous; leaflets petiolulate, oblong to lanceolate, base broadly cuneate to rounded, apex acuminate. |
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6 R. potaninii |
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Lower Taxa
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