Description from Flora of China
Alisma loeselii Gorski ex Juzepczuk.
Tubers small or not evident. Aerial leaves with petiole 2-31 cm; leaf blade lanceolate, 3-12.5 × 0.6-2 cm, sometimes larger, 3-5-veined, base cuneate, apex acuminate. Panicles 6-56 cm, in 2-5 whorls of 3-9 branches. Pedicel 1.5-4.5 cm. Sepals broadly ovate, 2.5-4.5 × 1.5-2.5 mm. Petals white, suborbicular, larger than sepals. Anthers elliptic, ca. 0.5 mm. Carpels regularly arranged; styles erect, ca. 0.4 mm, shorter than ovary, cirriform-recurved, stigmatose in upper 1/3-1/2 of their length. Achenes obovoid or triangular, 2-3 mm, 1- or 2-grooved abaxially; lateral pericarp splendent, opaque, thickish. Fl. and fr. Jun-Sep. 2n = 14, 16.
Margins of lakes, ponds, marshes, channels. Gansu, Heilongjiang, Henan, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shanxi, Xinjiang [Afghanistan, Kazakhstan, Mongolia, Pakistan, Russia, Tajikistan, Uzbekistan; Africa, SW Asia, Europe, North America].