Herbaceous perennial located in freshwater marsh
long, thin alternate leaves and flower with bilateral symmetry, 4 purple petals and 2 stamen
The ones with a peak in the middle
with Spirodela polyrhiza, floating aquatic
With Lemna, Wolffia and Azolla
in small pond on cultivated valley floor, pond kept full with runoff irrigation water
male flower on frond from small pond kept filled with irrigation runoff, in alluvial valley outside of town
ID tentative