Family: Alismataceae Vent.
Alisma plantago-aquatica
Distribution: This species has an almost cosmopolitan distribution – non-tropical areas of the Northern Hemisphere, and naturalized in Australia, New Zealand and Southern America.
Habitat: Grows in shallow water, on banks of ponds, lakes, canals, and in ditches, from lowlands to foothills.
Description: Perennial herb up to 100 cm high. The leaves are long-petiolate, ovate, the flowers in well-branched panicle, petals obovate, white. Flowers from June to September.
Alisma plantago-aquaticaAlisma plantago-aquatica
Alisma plantago-aquaticaAlisma plantago-aquatica
Photos: 17. 8. 2003 (Czechia, Lednice, park).