Russia Flora: Plant: Up to 60 cm tall, with tuber-like thickened base, from which arise leaves arranged in rosette and a leafless scape bearing inflorescence. Leaves: Leaf blade ovate or lanceolate-ovate, rounded or slightly cordate at base. Inflorescence: Panicle-like, with bracts at base of branches. Flowers: Petals 2.3-3.2 mm long and 2.4-2.9 mm wide, white. Anthers 0.5-0.8 mm long. Styles in flowers and fruits 0.4-0.6 mm long. Fruit: Fruitlets 1.3-2.1 mm long; thickened marginal part of their lateral sides rather abruptly transitions into semi-transparent membranous central part. Chromosome number: 2n=14 (Probatova, Sokolovskaya, 1984b). (Table XXXII). Flowering in July-September.

Distribution: Lower Zeya, Bureya, Ussuri (Fig. 99). Found along water bodies, in marshes and marshy meadows.

General distribution: Japanese-Chinese. Described from China (Yunnan Province).

Note: Before flowering, this species is indistinguishable from the following species, and in dried state both are difficult to distinguish even during flowering. However, the independence of both species is not in doubt, and hybrids between them are not formed (Bjorkovist, l.c.). A. plantago-aquatica in the Soviet Far East is introduced but behaves very actively and quickly spreads along roads, while A. orientale is confined to more natural habitats.