Greater Bur Marigold

Bidens radiata, commonly known as horseweed or beggarticks, is a plant traditionally used in few recorded practices. Its traditional uses are not well-documented across various cultures and traditions. Scientific studies have shown that future climate scenarios predict an expansion of suitable habitats for most Bidens species, with B. radiata being among the exceptions. Research indicates growth inhibition and neotenic flowering under short-day conditions compared to long-day conditions, but the evidence is limited in scope. Genetic diversity at the species level was found to be higher in Bidens cernua than in B. radiata var. pinnatifida or B. tripartita, though specific findings for B. radiata are not extensively detailed. The plant has a historical presence, as it was among the exotic species cultivated at the manor farm Švamberk from the 17th century onwards. No major safety issues have been recorded, and there is no evidence of significant drug interactions with other substances.

Informational only. Traditional use does not mean proven effectiveness. Evidence and safety vary — check the cited sources.