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Saudi Arabia flora checklist
Polygonum aviculare L.
Nomencalture
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Family: PolygonaceaeGenus: Polygonum
SUMMARY
♦ Polygonum aviculare Linnaeus, Sp. Pl. 362. 1753; Hook. f., Fl. Brit. Ind. 5: 26. 1856; Boiss., Fl. Or. 4: 1036. 1879; Boulos, l.c. 28.
Polygonum centinodum Lamk., Fl. Francies 3: 237. 1778; P. erectum Roth Beitr. Bot. 2: 131. 1783; P. heterophyllum Lindm. Svensk. Bot. Tidskr. 6: 960. 1912.
Suberect-erect, ascending or decumbent, glabrous annual herb, branched mostly from base. Leaves heterophyllous, lower larger on main branches, smaller on the lateral and upper branches, 0.8-2.5 x 0.25-1.0 cm, elliptic - lanceolate or ovate, acute, entire, dotted. Ochrea 0.75-1.25 cm long, bifid, silvery, membranous lacerate. Inflorescence solitary, axillary or 3-5 clusters . Flower 0.5-0.75 mm across, pedicel 0.5-0.75 (-1.0) mm. Ochrealae minute. Tepals 5, 1.5-2.0 x 0.5-1 mm, elliptic-lanceolate or ovate, obtuse-acute, entire. Stamens 5 (-4), filaments short, equal; anthers dorsifixed. Ovary 0.25-0.5 mm, ovate - circular, trigonous with 3 very short styles and capitate stigmas. Nuts 2-2.5 x 1.0-1.5 mm, ovate, trigonous, black, shining, striate.
Fl. Per.: March-September.