Coefficient of Conservatism:
Coefficient of Wetness:
In both shallow and deep water of lakes, ponds, and rivers.
One of our most distinctive species in its many-nerved leaves, stipules adnate to the leaf bases, and usually strongly two-ranked foliage. Occasionally flowers in Michigan; fruit is very rare throughout the range of the species. The form with perfectly entire leaves, f. cultellatus Fassett, occurs rarely.