Flaveria chlorifolia, the clasping yellowtops, is a North American plant species of Flaveria within the family Asteraceae. It is native to the southwestern United States (New Mexico, western Texas)Biota of North America Program 2014 county distribution map and northern Mexico (Chihuahua, Coahuila, Nuevo León).SEINet, Southwestern Biodiversity, Arizona chapter
Flaveria chlorifolia is a perennial herb up to 200 cm (80 inches or 6 2/3 feet) tall. One plant can sometimes produce 150 or more flower heads in a branching array, each head with 9-14 yellow disc flowers but no ray flowers.Flora of North America, Flaveria chlorifolia A. Gray, 1849. Clasping yellowtops Powell, Albert Michael. 1979. Annals of the Missouri Botanical Garden 65(2): 611-613 description and commentary in English, distribution map on page 608
Chemical composition Quercetin-3-sulfate 3'-sulfotransferase is an enzyme that uses 3'-phosphoadenylyl sulfate and quercetin 3-sulfate to produce adenosine 3',5'-bisphosphate and quercetin 3,3'-bissulfate. The enzyme can be found in F. chlorifolia.
Ombuin 3-sulfate, the sulfate conjugate of ombuin, can be isolated from F. chlorifolia.Ombuin 3-sulphate from Flaveria chloraefolia. Denis Barron and Ragai K. Ibrahim, Phytochemistry, Volume 27, Issue 7, 1988, pages 2362-2363,
References
External links Flaveria chlorifolia, Encyclopaedia of Life photo of herbarium specimen collected in Nuevo León in 1992