| Author | (L.) Britton, Sterns, & Poggenburg | |
| Distribution | Outer Coastal Plain, Outer Banks, and northern Coastal Plain/Piedmont edge; disjunct to the lower Piedmont of Richmond County (1999) and Cabarrus County (2007).
ME to IN, CO, and CA, south to FL, TX, and AZ. | |
| Abundance | Fairly common to locally common (to very common) close to the coast in tidal regions; less numerous farther inland, and quite rare in the western Coastal Plain and eastern Piedmont region. | |
| Habitat | Freshwater marshes, interdune marshes and pondshores, river shores and marshes, wet ditches. The Richmond County population is in an old meander of the Pee Dee River; the Cabarrus County population is from a drained beaver pond. | |
| Phenology | Flowering and fruiting August-November. | |
| Identification | Smooth Beggarticks is our showiest Bidens species, with ray florets 17 mm or more long (vs. 15 mm or less in Nodding Bur-marigold [B. cernua]). The leaves are not dissected, as they are in Bearded Beggarticks (B. aristosa), and plants are shorter (mostly 1-2 feet tall vs. 2-4 feet tall). | |
| Taxonomic Comments | None
| |
| Other Common Name(s) | Smooth Bur-marigold, Larger Bur-marigold | |
| State Rank | S3 [S4] | |
| Global Rank | G5 | |
| State Status | | |
| US Status | | |
| USACE-agcp | OBL link |
| USACE-emp | OBL link |
