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Published In: Species Plantarum 1: 265. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Contributor Text: YASIN J. NASIR
General/Distribution: 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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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.
 

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1 Shrubs, rarely trees, not more than 1.5-2 m tall (2)
+ Trees up to 12 m tall (5)
2 (1) Unarmed shrubs. Leaflets lanceolate (3)
+ Spinescent shrubs. Leaflets obovate-cuneate 1 Rhus mysurensis
3 (2) Leaves imparipinnate, leaflets 5-25 in number (4)
+ Leaves trifoliolate 5 Rhus lancea
4 (3) Leaf rachis winged. Leaflets 10-15 mm broad, entire (sometimes subdentate towards the apex). Drupes pubescent, with reddish hairs which are not floccose 7 Rhus copallinum
+ Leaf rachis not winged. I eaflets 15-35 mm broad, serrate. Drupes covered with dense crimson red floccose hairs 6 Rhus typhina
5 (1) Branchlets and shoots rusty pubescent or tomentose. Leaves not membranous. Panicles erect, dense-lowered. Drupes 3.5-4.5 mm broad, pubescent to tomentose (6)
+ Branchlets and shoots glabrous. Leaves membranous. Panicles ± lax and drooping. Drupes 6-7 mm broad, shiny pale yellow-brown, glabrous 2 Rhus succedanea var. himalaica
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 3 Rhus punjabensis
+ 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 4 Rhus javanica
 
 
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