The following species in the flowering plant genus Verbesina, often known as crownbeards, are accepted by Plants of the World Online.[1][2] Although the genus originated in North America, the greatest diversity is now found in South America.[3]
Book: Clute . Willard Nelson . Willard Nelson Clute . 1923 . A Dictionary of American Plant Names . Joliet, Illinois . Willard N. Clute & Co. . 89 .
10.2307/2446011 . 2446011 . Chloroplast DNA Restriction Site Study of Verbesina (Asteraceae: Heliantheae) . Panero . Jose L. . Jansen . Robert K. . American Journal of Botany . 1997 . 84 . 3 . 382–392 . 21708591 .