The flower petals of the Uppam cotton plant (G. herbaceum) contain as their main components gossypitrin and quercetin. An appreciable quantity of a new glycosidic pigment and a small quantity of gossypetin were also isolated. Uppam petals, therefore, differ in their composition from those ofG. herbaceum examined by Perkin who probably obtained his supply of the petals from the North Indian variety. His results indicated that gossypitrin was the main component and that isoquercitrin was present in small quantities.