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Coreopsis Linnaeus. 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) have begun 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. It appears likely that the clade consisting of sections Gyrophyllum (C. major, C. delphiniifolia, C. verticillata, and C. tripteris) and Silphidium (C. latifolia) will also be removed.

Ref: Allison & Stevens (2001); Barger et al. (2023); Crawford & Mort (2005); Cronquist (1980); Kim et al. (1999); 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); Wunderlin & Hansen (2011). Show full citations.

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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.

image of plant© Gary P. Fleming | Coreopsis verticillata | Original Image ⭷
image of plant© Floyd A. Griffith | Coreopsis nudata | Original Image ⭷
image of plant© Richard & Teresa Ware | Coreopsis latifolia CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Gary P. Fleming | Coreopsis tripteris | Original Image ⭷
image of plant© Scott Ward | Coreopsis gladiata | Original Image ⭷
image of plant© Lowell Urbatsch | Coreopsis linifolia | Original Image ⭷
image of plant© Richard & Teresa Ware | Coreopsis pulchra CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Grant Morrow Parkins | Coreopsis auriculata | Original Image ⭷
image of plant© Bruce A. Sorrie | Coreopsis rosea | Original Image ⭷

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