Flaveria chlorifolia

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 and northern Mexico.
Flaveria chlorifolia is a perennial herb up to 200 cm 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.

Chemical composition

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.