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a type of racemose inflorescence in angiospermous plants. The lower flower stalks (in a simple corymb) or branches (in double and compound corymbs) are longer than the upper ones. The flowers are arranged in a single plane, with the outer ones opening first. The corymb originated as a type of raceme. The corymbose polychasium and the corymbose panicle are often confused with the corymb.