They can make an almost-solid carpet of bright yellow. The leaves of these plants have tiny, bladder-like traps for catching microscopic aquatic animals. It has rather large flowers, each with a conspicuous curved spur. One can also find much smaller bladderworts, U. gibba, U. subulata , or both, adjacent to U. cornuta . Insects attracted to the nectar become hopelessly trapped and are eventually digested.
Plants range from smaller than a dime in diameter to about fifty-cent piece size.
Sundews have small pink flowers which appear on a slender stalk that arises from the center of the rosette and unrolls. Their leaves are modified into slender green pitchers. The inner rim of each pitcher is lined with stiff, downward-pointing hairs. Below the hairs, the inner surface of the pitcher is smooth and slick. Any insect foolish enough to venture into the pitcher looking for the source of an appealing smell quickly finds itself sliding downwards into a pool of digestive juices in the bottom of the trap.