Hymenopappus radiatus, the ray hymenopappus, is a North American species of flowering plant in the daisy family.
It is endemic to the state of Arizona, in the southwestern United States.Biota of North America Program 2014 county distribution map
Description Hymenopappus radiatus is a perennial herb up to tall. One plant produces 6-8 flower heads per stem, each head 8 white ray flowers surrounding 30–50 yellow disc flowers.Flora of North America, Hymenopappus radiatus Rose, 1891. Rose, Joseph Nelson. 1891. Contributions from the United States National Herbarium 1(4): 122
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