Coreopsis
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A slice of the head of flowers of a Coreopsis, with one tubular perfect flower (a) left standing on the receptacle, with its bractlet or chaff (b), one ligulate and meutral ray-flower (cc), and part of another; (dd), section or bracts or leaves of the involucre.
Galleries
Flowers and Shrubs: CSource
Asa Gray The Elements of Botany for Beginners and for Schools (New York, Cincinnati, Chicago: American Book Co., 1887)
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