Coreopsis Linnaeus. Common name: Coreopsis, Tickseed.
Contributed by Alan S. Weakley and Bruce A. Sorrie
A genus of about 30 species, herbs, of America (once unrelated groups are removed). Recent molecular studies suggest that the relationship between Bidens and Coreopsis (as traditionally circumscribed) is complex, and that changes in taxonomy will be needed to more accurately reflect relationships (Kim et al. 1999; Crawford & Mort 2005). Tadesse & Crawford (2014) began this process, removing from Coreopsis some unrelated groups into Electra, Leptosyne, and (perhaps) Heterosperma; two additional clades, traditionally treated in Coreopsis section Pseudoagarista, will likely be removed. Tadesse & Crawford (2023) continued the process by elevating two sections to generic rank: Gyrophyllum [but necessarily Anacis] (C. major, C. delphiniifolia, C. verticillata, C. pulchra, C. palmata, C. tripteris) and Silphidium (C. latifolia). Gyrophyllum is illegitimate, however, and was replaced with Anacis (Feng, Huang, & Liu 2024)
References: Allison & Stevens (2001); Barger et al. (2023); Cronquist (1980); Feng et al. (2024); Schilling, Johnson, & Iacona (2015); Sherff & Alexander (1955); Smith (1976); Sorrie, LeBlond, & Weakley (2013); Strother (2006yy) In Flora of North America Editorial Committee (2006c); Tadesse & Crawford (2014); Tadesse & Crawford (2023); Wunderlin & Hansen (2011). Show full citations.
Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.









Feedback
See something wrong or missing on about Coreopsis? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.