Hymenothrix loomisii, the Loomis' thimblehead, is a North American species of flowering plant in the daisy family. It grows in the southwestern United States (Arizona, New Mexico, southern Nevada), and also in the Sierra Madre Occidental in western Chihuahua. There have been reports of populations in southern California but these are most likely introductions.Biota of North America Program 2014 county distribution mapSEINet, Southwestern Biodiversity, Arizona chapter
Hymenothrix loomisii is an annual herb up to tall. Each head has 10-20 yellow or cream-colored disc flowers but no ray flowers.Flora of North America, Hymenothrix loomisii S. F. Blake, 1927. Blake, Sydney Fay. 1927. Proceedings of the Biological Society of Washington 40(10): 49–50
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