Flowers in this family are typically 4-merous, with inferior ovary and very small to virtually no calyx lobes.
Key to the species of Cornus.
All species found in Cornaceae
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. May 20, 2018. https://www.michiganflora.net/family.aspx?id=Cornaceae.