Flora of the Southeastern United States

Coreopsis Linnaeus. Common name: Coreopsis, Tickseed.

Contributed by Alan S. Weakley and Bruce A. Sorrie

Key to Coreopsis

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 (1976a); 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.

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