Coefficient of Conservatism:
Coefficient of Wetness:
B. S. Walters
Fens (sometimes in sphagnum), margins of ponds and lakes, marshy shores, pools between dunes, marly areas; also in softwater lakes and their sandy shores.
This is undoubtedly the bladderwort most often seen by travelers in Michigan, for it can form extensive bright yellow carpets in sandy interdunal hollows, borrow pits along highways, and in wet peatlands. In unusually dry years flowers may be scarce, as they may be also in extraordinarily wet seasons. The flowers (sometimes mistaken for some kind of orchid) are very fragrant and attract insects, even large yellow tiger swallowtail butterflies.
Robust plants may be as tall as 35 cm. The tiny bladder traps of this so-called terrestrial species are, as in U. resupinata, buried with the branch and leaf system in the substrate.
If one has a blooming Utricularia without basal parts, U. cornuta can be recognized by having tiny bracteoles narrower but slightly longer than the bracts of the inflorescence subtending them. No other of our species has such bracteoles.