It was given the name bittersweet by colonists in the 18th century because the fruits resembled the appearance of the fruits of common nightshade (Solanum dulcamara), which was also called bittersweet. Today, American bittersweet is the accepted common name of C. scandens in large part to distinguish it from an invasive relative, C. orbiculatus (Oriental bittersweet), from Asia.[1] Based on a study, a hybrid of C. orbiculatus and C. scandens showed a reduced seed set and a small, infertile pollen. And a hybrid is produced by a C. scandens’ seed and a C. orbiculatus’ pollen.[4]