Grindelia oxylepis, the Mexican gumweed, is a North American species of flowering plants in the family Asteraceae. It is native to northern Mexico, in the States of Chihuahua, Coahuila, Durango, San Luis Potosí, and Zacatecas. The natural range barely crosses the Río Grande into the United States, with a few populations in western Texas and southern New MexicoBiota of North America Program 2014 county distribution mapNesom, G.L. 1990. Studies in the systematics of Mexican and Texan Grindelia Asteraceae: Astereae. Phytologia 68(4): 303–332 distribution map on page 307
Grindelia oxylepis grows in moist valleys and fields. It is an annual or biennial herb up to tall. The plant usually produces numerous flower heads in open, branching arrays. Each head has 20-30 ray flowers, surrounding a large number of tiny disc flowers.Flora of North America, Grindelia oxylepis Greene, 1899.
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External links photo of herbarium specimen at Missouri Botanical Garden, collected in Durango in 1898