Together with hemp and hop, nettle belongs to the nettle order (at the same time, hop belongs to the Cannabaceae
Hemp belongs to the Cannabaceae
family, which consists of erect climbing plants.
Why the cannabinoids have evolved remains open to speculation (indeed, why other species in the Cannabaceae
have secretory epidermal cells is equally unclear).
Crawford Harrison Huperzia lucidula (Michx.
sativa with any other species in the Cannabaceae
, and all plants of Cannabis interbreed freely, so classification of Cannabis according to Harlan and de Wet's concept is simple: all plants belong to the primary genepool of the one biological species, C.