Grindelia havardii, or Havard's gumweed, is a North American species of flowering plants in the family Asteraceae. It is native to the south-central United States, in the states of Texas and New Mexico.Biota 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 308
Grindelia havardii grows in open, sunny sites on rocky slopes and in alluvial deposits. It is a perennial herb sometimes as much as 150 cm (5 feet) tall. The plant usually produces numerous flower heads in crowded, flat-topped arrays. Each head has 18-25 ray flowers, surrounding a large number of tiny disc flowers.Flora of North America, Grindelia havardii Steyermark, 1934Steyermark, Julian Alfred. 1934. Annals of the Missouri Botanical Garden 21(3): 474–476 diagnosis in Latin, description and commentary in English, line drawing on page 476 (figure 11 at left)
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External links photo of herbarium specimen at Missouri Botanical Garden, collected in Texas in 1931, isotype of Grindelia havardii