Cabomba caroliniana is a rooted, submerged aquatic, to 2 m long from a creeping rhizome; branched.
Leaves opposite, stalk to 3 cm, blade to 5 cm wide, round in outline, palmately, finely dissected with linear segments, a few floating leaves, when present, to 2 cm, linear, constricted in middle where stalk is inserted on underside.
Flowers white with yellow center, radially symmetrical, about 2.5 cm wide, petals 6, stamens 3-6.
Fruit a small, leathery capsule.
Wetland status: OBL.
Frequency in NYC: Very infrequent.
Origin: Native to southern New Jersey and south.
Habitat: Introduced into quiet ponds with aquatic nursery stock, or otherwise introduced in NYC.