Myriophyllum heterophyllum Michx.
Family: Haloragaceae
two-leaf water-milfoil, various-leaved water-milfoil
Myriophyllum heterophyllum image
Paul Skawinski  
Etymology: Myriophyllum: from Greek myrios, "numberless," and phyllon, "leaf," alluding to the many divisions of the submerged leaves of these aquatic plants
Plants: perennial, submersed aquatic; from hardy rhizomes
Leaves: mostly in closely-spaced whorls but some scattered, short-stalked; finely pinnately-divided into 7-10 thread-like, paired leaflets
Flowers: red to pink, 4-parted, small, with no winter buds; inflorescence a 2"-6" clustered spike held above the water with flowers from the axils of the sharply-toothed, whorled bracts
Fruits: hard, 4-parted with a curved beak
Habitat: water to 16' deep; in sediment soil
Conservation Status: Native