2008.05.23: Austria, Vienna XXII. district,150 m AMSL, bayou (Schilfgrtel): habitat.Flowering in may/june.In some regions still quite common.German names: Wasser-Schwertlilie, (Gelbe) Sumpf-S.
2010.04.08 Austria, Vienna XXII. district (in temporarily flooded creek - Hausgraben, here still dry - a couple of weeks later the place was flooded, 153 m AMSL).Young leaves with the shape typical for Iris.German name: Sumpfschwertlilie
Abbildungen der in Deutschland und den angrenzenden gebieten vorkommenden grundformen der orchideenartenBerlin,R. Friedlnder & sohn,1904.biodiversitylibrary.org/page/15349916