Ray-flower definition

Any of the small tubular flowers having a corolla with a long strap-shaped lobe, found in the flower heads of certain composite plants, as the units of a flower head of a dandelion or the marginal units of a flower head of a daisy.
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Any of the flowers around the margin of the flower head of certain composite plants, as the daisy or aster.
noun
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One of the narrow flowers, resembling single petals, that surround the central disk in the capitulum or flower cluster of a plant of the composite family (Asteraceae or Compositae), such as the daisy or sunflower. Rays are often male flowers with sterile stamens.
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