Coefficient of Conservatism:
Coefficient of Wetness:
C. verna of Michigan Flora.
In muddy or sandy substrates in shallow water of lakes, ponds, streams, river margins, swamps, ditches, and (often) puddles in old trail roads; often in cold spring-fed waters, ± terrestrial on recently exposed shores and banks.
Since fruits start ripening fairly early in the season, most collections have some fruits far enough advanced to demonstrate the characteristic narrow wings at the apex, as well as the more elongate shape compared to the fruit of C. heterophylla.