欧亚萍蓬草 ou ya ping peng cao

Nymphaea lutea Linnaeus, Sp. Pl. 1: 510. 1753.

Rhizomes stout, 3--8 cm in diam. Petiole ca. 50 cm, glabrous; floating leaf blade elliptic, 15--30 × 10--22 cm, leathery, abaxially glabrous or pubescent, adaxially glabrous, base cordate and basal lobes spreading. Flower 4--5 cm in diam. Peduncle to ca. 50 cm, glabrous. Sepals yellow, broadly ovate to orbicular, 2--3 cm. Petals linear, 1--1.5 cm, apex truncate to rounded. Anthers yellow, 4--7 mm. Stigmatic disc entire,7--19 mm in diam., rays 5--25. Fruit ca. 2.5 cm in diam. Seeds olive green, ovoid, ca. 5 mm. Fl. Jul--Aug. 2n = 34.

Lakes and ponds. Xinjiang [Kazakhstan, Russia (Siberia); Africa, SW Asia, Europe].