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Published In: Genera Plantarum 130. 1776. (Gen. Pl.) Name publication detail
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Contributor Text: S.I. ALI
General/Distribution: A genus with about 10-20 species, distributed in Europe and Asia; represented in Pakistan by 6 species.

 

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Rhizomatous herbs or undershrubs, young branches often twining. Leaves opposite, petiolate, lamina suborbicular to lanceolate. Flowers in axillary few-flowered cyrnes. Corolla lobes twisted in bud. Corona simple, 5-lobed or partite, lobes without internal processes, free or fused at the base only. Pollinia solitary in each loculus, pendulous, without a pellucid margin. Follicles smooth, fusiform.
 

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1 Corolla lobes hairy within (3)
+ Corolla lobes glabrous within (2)
2 (1) Leaves dark green above, light green below, 2-3 times as long as broad 1 Vincetoxicum hirundinaria
+ Leaves ± of similar colour on both the sides, 3-5 times as long as broad 2 Vincetoxicum cardiostephanum
3 (1) Coronal lobe less than ½ the corolla lobe (4)
+ Coronal lobe more than ½ the corolla lobe 3 Vincetoxicum canescens
4 (3) Flowers clusters axillary, sessile or shortly pedunculate, corona lobes rhomboid or deltoid (5)
+ Flower clusters conspicuously pedunculate, (particularly in lower part of stem), corona lobes linear or narrowly ovate 5 Vincetoxicum stocksii
5 (4) Inflorescence sessile, corona lobes rhomboidal, not tuberculate, divergent 4 Vincetoxicum arnottianum
+ Inflorescence shortly pedunculate, corona lobes broadly deltoid, tuberculate, convergent 6 Vincetoxicum sakesarense
 
 
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