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During the blooming period, Plains Coreopsis produces showy flowerheads in abundance. This species can be distinguished from other wildflowers by the ray florets of its flowerheads, which are yellow-maroon or maroon (reddish brown). Sometimes the ray florets of Rudbeckia hirta (Black-Eyed Susan) and Rudbeckia fulgida (Orange Coneflower) are partially maroon, but their ray florets have narrow tips that lack large teeth. Furthermore, the leaves of these latter species are not pinnately divided, unlike those of Plains Coreopsis. Other Coreopsis spp. in Illinois are perennial plants; they have ray florets that are yellow throughout. Another common name of Coreopsis tinctoria is Golden Coreopsis.


Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© John Hilty

Source: Illinois Wildflowers

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