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3. Koenigia Linnaeus, Syst. Nat. ed. 12. 2: 71. 1767; Mant. Plant. 1. 1241. 1767; Tutin in Tutin et al., Fl. Europ. 1: 76. 1964; Losinsk. in Kom., Fl. URSS 5: 704. 1936; Grierson & D.G.Long, Fl. Bhutan, 1(1): 157. 1983; Munshi & Javeid, Syst. Stud. Poly. Kashm. Him. 49. 1986; Ronse Decr.& Akeroyd in Bot. J. Linn. Soc. 98: 368. 1988.
Polygonum L. sect. Koenigia (L.) Hook. f., Fl. Brit. Ind. 5: 24. 1886; Polygonum L. sect. Eleutherosperma Hook.f., l.c.
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.
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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| 1 |
Flowers in axillary clusters. |
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2 K. delicatula |
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Flowers in terminal flat topped, corymbs surrounded by leaves. |
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(2) |
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| 2 (1) |
Leaves ovate, acute. |
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1 K. nepalensis |
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Leaves rounded and obtuse. |
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(3) |
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| 3 (2) |
Plants hairy, more at the nodes, perianth segments 5, 1.5-2 mm long. Stamens 5. |
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3 K. nummularifolia |
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Plants glabrous, perianth segments 3, c. 0.75 mm long. Stamens 1-3. |
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4 K. islandica |
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Lower Taxa
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