Flaveria campestris, common name alkali yellowtops, is a plant species native to the southwestern United States and to the southern Great Plains (Arizona, Utah, New Mexico, Colorado, Texas, Missouri, Kansas, Oklahoma).Biota of North America Program 2014 county distribution map It is found on saline soils and on the margins of lakes, ponds and streams.Flora of North America, Flaveria campestris J. R. Johnston, 1903. Alkali yellowtops .
Flaveria campestris is an annal herb up to 90 cm (3 feet) tall. It produces a tightly packed corymb of up to 100 small flower heads. Flowers are yellow, sometimes lacking ray flowers, other times with only a single ray flower per head. Each head has 5-8 disc flowers.Johnston, John Robert. Proceedings of the American Academy of Arts and Sciences 39(11): 287. 1903.Powell, Albert Michael. 1979. Annals of the Missouri Botanical Garden 65(2): 626-628 description and commentary in English, distribution map on page 608
References
External links SEINet Southwestern Biodiversity, Arizona chapter