Etymology: Mimulus: may come either from Greek mimo, "an ape," because of resemblance of markings of seeds to face of a monkey, or from Latin mimus, "an actor or mimic," because flower is like mouthpiece of one of the grinning masks worn by classical actors.
Plants: drooping to erect perennial, 1"-20" tall, aquatic forb; stems weak, mostly smooth
Leaves: opposite, palmately-veined
Flowers: yellow often with reddish dots, 5-parted, 1/3"-1" long, throat open, lower lip bearded, sepals connected into a tube, 4 stamens, long-stalked flowers from the leaf axils; blooms June-Aug.
Fruits: cylindrical capsule
Habitat: wet; shallows, spring ponds; in limy soil
Conservation Status: Native