A plant genus of the family CORNACEAE. It is widely cultivated for the attractive flowers.

A plant family of the order Cornales, subclass Rosidae, class Magnoliopsida that is a loose grouping of woody ornamentals: 11 of its 14 genera have been placed in single families by some authorities. Some botanists combine members of NYSSACEAE into this family.

A subclass of iridoid compounds that include a glycoside moiety, usually found at the C-1 position.