Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
M. exalbescens of Michigan Flora.
Rivers, ponds, and lakes, in very shallow water or at depths as great as 5.5 m; often in calcareous waters, with marly bottoms. The turions produced by this species are more cylindrical than in M. verticillatum, or even somewhat tapered toward the apex rather than clavate; they have very distinctive short, dark, stiff leaves, some of which often remain above the characteristic U-shaped base of the plant when the turion germinates. Rarely an otherwise normal mature stem will bear only such leaves (distinguished from M. alterniflorum by their very stiff nature and extremely dark green color); plants of this sort have been collected in cold running water.