2010.07.30 Vienna XXII. (Hausgraben - bayou 153 m AMSL).Put on a stem of grass to make it easier to shoot details; here from the side, with root.German name: Klein-Wasserlinse
2010.07.27 Vienna XXII. (Hausgraben - bayou 153 m AMSL).In Hausgraben habitat this is the dominating species in its lower parts (near where the stream begins to ooze away into the woodlands).German name: Gewhnlich-Froschlffel
2010.07.23 N Gnserndorf (bayou, 150 m AMSL).Flowering from may till september; here with Nuphar lutea.Not uncommon.German name: Schwimm-LaichkrautID: Fischer & al., Exkursionsflora (2008 3rd)
2010.07.30 Vienna XXII. (Hausgraben - bayou 153 m AMSL).Put on a stem of grass to make it easier to shoot details; here top side.German name: Klein-Wasserlinse