| Author | L. | |
| Distribution | Scattered from the Mountains to Greene County in the Coastal Plain; most widespread in the Piedmont.
Native of Eurasia and Africa; in N.A. throughout the U.S. and much of southern Canada. | |
| Abundance | Generally uncommon as an escape; perhaps somewhat overlooked. | |
| Habitat | Waste ground, crop fields, garden weed, vegetable garden weed, cemetery, pasture. | |
| Phenology | Flowering June-September. | |
| Identification | This is an annual that usually does not exceed 2 feet high. The leaves are few to many, deeply 3-lobed, margins with irregular blunt teeth -- producing an odd-looking but very distinctive form. The flowers occur on long stalks from leaf axils, with the petals about 1-inch long, creamy yellow with a brown-violet basal spot; each flower lasts only a few hours (hence the common name). | |
| Taxonomic Comments | | |
| Other Common Name(s) | | |
| State Rank | SE | |
| Global Rank | GNR | |
| State Status | | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
