High Quality Content by WIKIPEDIA articles! Cannabaceae is a small family of flowering plants. According to the Royal Botanical Gardens database, there are 170 species grouped in nine to fifteen genera, including three well-known genera Cannabis (hemp), Humulus (hops) and Celtis (hackberries). Celtis is by far the largest genus, counting 60-70 species. However Celtis is sometimes considered to be in a sister family, Celtidaceae. Cannabaceae used to be part of the order Urticales, which is now included into Rosales. The family is closely allied with the other families of the old Urticales, Moraceae, Urticaceae, and Ulmaceae. The old Urticales are sister to the rest of Rosales. Celtis is peculiar among Cannabaceae, as it is a tall tree and it is not dioecious. It was previously included either in the strictly related family Ulmaceae (the elm family) or their own family the Celtidaceae, and has been recently included into Cannabaceae by the Angiosperm Phylogeny Group after genetic analysis.

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