| Author | (Kunth) Raven | |
| Distribution | Mostly in the Piedmont; a few records in the Coastal Plain.
Native of the New World; in N.A. southern NY to NE, south to FL and TX; NM, AZ, CA, OR, WA. The native distribution in the U.S. is uncertain, but probably the Mississippi River drainage and CA. | |
| Abundance | Apparently rare. | |
| Habitat | Fresh marsh, impoundments and artificial ponds, slow rivers and their shores, retention pond. Apparently seldom at lake shores and larger bodies of water. | |
| Phenology | Flowering and fruiting May-October. | |
| Identification | This herb creeps along the ground and roots at nodes; or it may float in shallow water. Flowering branches rise up above the surface and are glabrate. The leaves low down on the stem often are obovate, while floating and upper leaves are lanceolate or oblanceolate. The flowers have 5 petals, yellow, 10-15 mm long, smaller than most of the other non-native species in the state. | |
| Taxonomic Comments | It appears that all our material is of var. glabrescens.
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| Other Common Name(s) | | |
| State Rank | SE? * | |
| Global Rank | G5 | |
| State Status | | |
| US Status | | |
| USACE-agcp | OBL link |
| USACE-emp | OBL link |
