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Published In: Mantissa Plantarum 1: 3, 35. 1767. (Mant. Pl.) Name publication detail
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Synonym Text: Polygonum L. sect. Koenigia (L.) Hook. f., Fl. Brit. Ind. 5: 24. 1886; Polygonum L. sect. Eleutherosperma Hook.f., l.c.
General/Distribution: A small genus with 7-8 species, distributed in arctic Himalayas and Asia, temperate Europe; represented by 4 species in our area.

 

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Small annual or perennial, diffusely branched herbs with prostrate rarely ascending stem. Leaves opposite to subopposite, subsessile to petiolate, ochrea tubular or 2-partite. Flowers in terminal, axillary clusters or heads, sessile to pedicellate. Perianth 3-5 cleft, sepaloid, outer 2 tepals usually small. Stamens 2-5 alternating with staminodes, filaments usually short. Pollen grains tri-pantoporate, spinulose. Stigmas 2-3, ± rounded, styles 2-3, short, ovary orbicular-trigonous. Nut small, trigonous, biconvex or subcompressed; inserted or rarely exserted.
 

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1 Flowers in terminal flat topped, corymbs surrounded by leaves. (2)
+ Flowers in axillary clusters. 2 Koenigia delicatula
2 (1) Leaves rounded and obtuse. (3)
+ Leaves ovate, acute. 1 Koenigia nepalensis
3 (2) Plants glabrous, perianth segments 3, c. 0.75 mm long. Stamens 1-3. 4 Koenigia islandica
+ Plants hairy, more at the nodes, perianth segments 5, 1.5-2 mm long. Stamens 5. 3 Koenigia nummulariifolia
 
 
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