Rheum rhaponticum
 Rheum rhaponticum the false rhubarb rhapontic rhubarb or rhapontic is a plant species found in the wild in the genus Rheum.Hyperoside the 3-O-galactoside of quercetin can be found in R. rhaponticum where it serves as a UV blocker found in the bracts. It also contains the hydroxystilbenes rhaponticin and desoxyrhaponticin.