Rigiopappus is a genus of North American plants in the tribe Astereae within the family Asteraceae.Gray, Asa. 1865. Proceedings of the American Academy of Arts and Sciences 6: 548Tropicos, Rigiopappus A. Gray Flora of North America, Vol. 20 Page 48, Rigiopappus A. Gray It is closely related to genus Pentachaeta.
The only species is Rigiopappus leptocladus, sometimes known as wireweed. It is an annual plant sending up slender stems terminating in small daisylike yellow flowers. It is native to the western United States (California, Nevada, Oregon, Washington, Idaho).Flann, C (ed) 2009+ Global Compositae Checklist Biota of North America Program 2013 county distribution map
References
External links
Jepson Manual Treatment USDA Plants Profile Photo gallery