Aphanostephus riddellii is a North American species of flowering plants in the family Asteraceae, with the common name Riddell's lazydaisy. It is native to the southwestern and south-central United States (states of New Mexico and Texas), as well as to the state of Coahuila in northern Mexico.Biota of North America Program 2014 county distribution map
Aphanostephus riddellii is perennial herb up to 50 cm (20 inches) tall. It grows in open, sunny locations, often amongst scrub oaks.Flora of North America Vol. 20 Page 352 Plains lazydaisy, Aphanostephus riddellii Torr. & A.GrayTurner, B. L. 1984. Taxonomy of the genus Aphanostephus (Asteraceae–Astereae). Phytologia 56: 81–101.Torrey, John & Asa Gray. 1842. Flora of North America 2(2): 189 The plant is named for American botanist John Leonard Riddell, 1807 – 1865.
References
External links Lady Bird Johnson Wildflower Center, University of Texas