| Author | L. | |
| Distribution | Mostly Piedmont, with one record from the southwestern Mountains.
Native of Eurasia; in N.A. scattered across the U.S. | |
| Abundance | Rare on the landscape, except for Cabarrus County, where taken from several locations. | |
| Habitat | Fallow cropfields (especially wheat), fields, roadsides, disturbed suburban lots, roadsides, river bottomlands. | |
| Phenology | Flowering and fruiting April-June. | |
| Identification | Corn Buttercup is best identified by its papillose seeds (tiny bumps) and smallish bright yellow flowers -- about 2/5-inch across. The seed beak is more than 2 mm long (vs. less than 2 mm long in R. sardous). All leaves -- basal and cauline -- are strongly dissected. | |
| Taxonomic Comments | | |
| Other Common Name(s) | | |
| State Rank | SE | |
| Global Rank | GNR | |
| State Status | | |
| US Status | | |
| USACE-agcp | FAC link |
| USACE-emp | FAC link |
