Bearded Beggarticks (Bidens aristosa (Michx.) Britton)
Also known as Ozark tickseed sunflower; also classified as Bidens aristosa var. retrorsa.
Both USDA PLANTS and BONAP both lump long-bracted tickseed sunflower (Bidens polylepis) in with this species, without recognizing any varieties or subspecies. Most other authorities, including POWO, Go Botany, FSUS, separate them, and we follow this other scheme, separating the two. Some authorities have treated these taxa as different varieties of one species, under this name.
↑Links & External Resources
• Bidens aristosa (bearded beggarticks)‡ | USDA PLANTS Database (About This Site)
• Bidens aristosa | Go Botany (About This Site)
• Bidens aristosa | CABI Invasive Species Compendium (About This Site)
• Bidens aristosa‡ | Biota of North America Project (BONAP) (About This Site)
• Bidens aristosa | NatureServe Explorer (About This Site)
• Bidens aristosa | Flora of North America (About This Site)
• Bidens aristosa | Missouri Plants (About This Site)
• Midwestern Beggarticks | Maryland Biodiversity Project (About This Site)
• Bidens aristosa (Michx.) Britt. (Ozark Tickseed Sunflower) | Digital Atlas of the Virginia Flora (About This Site)
Different Taxonomic Treatments
‡ These links refer to a larger population than covered by this page.