Genera 2, species 4 (2 genera, 3 species in the flora).
Genera in Cannabaceae have sometimes been included in Moraceae (H. A. Gleason 1968); M. L. Fernald (1950) placed them in a separate family, Cannabinaceae.
Cannabaceae are wind pollinated. They are indigenous to the temperate Northern Hemisphere, widely cultivated, often introduced, and often ruderal.
Cystoliths, including those of Cannabis sativa, are frequently used in police laboratories to make positive identification of leaf fragments.