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2. Rhus L., Sp. Pl. 265. 1753. Gen. Pl., ed. 5:120.1754; J.L. Stewart & Brandis, For. Fl. 117.1874; Brandis, Ind. Trees, 196.1906; Parker, For. Fl. Punj. 111.1918; C. Jeffery in Townsend et al., Flora Iraq, 4,1:489-492. 1980.
YASIN J. NASIR
Polygamous or dioecious trees or shrubs, usually sapiferous; sap often irritant. Leaves compound. Flowers small, greenish, in axillary or terminal panicles. Calyx persistent, 4-6-lobed; lobes imbricate. Petals 4-6, spreading. Disk present. Stamens as many as or twice the number of petals; anthers bilocular, imperfect in the female flowers. Ovary unilocular; styles 3, usually free. Drupe small and dry.
Commonly known as ‘sumacs’. A genus of 250 species occurring in the warm temperate and subtropical regions of both the hemispheres. Represented in Pakistan by 7 species, 4 of which are native.
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| 1 |
Shrubs, rarely trees, not more than 1.5-2 m tall |
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(2) |
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Trees up to 12 m tall |
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(5) |
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| 2 (1) |
Spinescent shrubs. Leaflets obovate-cuneate |
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1 Rhus mysurensis |
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Unarmed shrubs. Leaflets lanceolate |
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(3) |
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| 3 (2) |
Leaves trifoliolate |
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5 Rhus lancea |
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Leaves imparipinnate, leaflets 5-25 in number |
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(4) |
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| 4 (3) |
Leaf rachis not winged. I eaflets 15-35 mm broad, serrate. Drupes covered with dense crimson red floccose hairs |
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6 Rhus typhina |
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Leaf rachis winged. Leaflets 10-15 mm broad, entire (sometimes subdentate towards the apex). Drupes pubescent, with reddish hairs which are not floccose |
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7 Rhus copallina |
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| 5 (1) |
Branchlets and shoots glabrous. Leaves membranous. Panicles ± lax and drooping. Drupes 6-7 mm broad, shiny pale yellow-brown, glabrous |
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2 Rhus succedanea var. himalaica |
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Branchlets and shoots rusty pubescent or tomentose.
Leaves not membranous. Panicles erect, dense-lowered. Drupes 3.5-4.5 mm broad, pubescent to tomentose |
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(6) |
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| 6 (5) |
Leaf rachis not winged. Leaflets ovate-oblong, entire. Panicles much shorter than the leaves. Petals glabrous on the upper surface. Disk obscurely 5-lobed. Drupe 3.5-4 mm long. Seed c. 2.8 mm long |
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3 Rhus punjabensis |
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Leaf rachis winged. Leaflets elliptic or elliptic-oblong, serrate. Panicles ± equalling the leaves. Petals pubescent on the midrib of the upper surface. Disk 10-lobed. Drupe ± 4.5 mm long. Seed 4 mm long |
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4 Rhus javanica |
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Lower Taxa
Related Synonym(s):
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