Ambrosia grayi, the woollyleaf bur ragweed, is a North American species of plants in the family Asteraceae. It is native to the west-central part of the Great Plains of the United States, in the states of Nebraska, Kansas, Colorado, New Mexico, Oklahoma, and Texas.Biota of North America Program 2014 county distribution map
Ambrosia grayi is a perennial herb up to 30 cm (12 inches) tall. Leaves are elliptical or egg-shaped. Flower heads are small and inconspicuous, as the plant is wind-pollinated. The heads develop into spiny burs as the seeds ripen.Flora of North America Vol. 21 Page 17 Ambrosia grayi (A. Nelson) Shinners, Field & Lab. 17: 174. 1949
References
External links Goodwell and Texhoma, Oklahoma Pasture and Roadside Plants; Ambrosia grayi Bur ragweed Pollen Library Department of Horticulture and Crop Science The Ohio State University, Seed Identification Workshop