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This genus is accepted, and its native range is Central & W. Asia to China.
Cannabis sativa

[FTEA]

Cannabaceae, B. Verdcourt. Flora of Tropical East Africa. 1975

Morphology General Habit
Erect annual aromatic herb
Morphology Leaves
Leaves alternate, or opposite at the base of the stems, palmately divided into narrow leaflets; stipules linear, acute
sex Male
Male flowers numerous, shortly pedicellate, in lax drooping terminal and axillary panicles; tepals free, oblong, spreading or reflexed; anthers at length pendulous
Morphology Reproductive morphology Flowers
Female flowers fewer, in short erect spikes, leafy below, each flower sessile in the axil of an enveloping bracteole and also with a stipule-like bract; perianth inconspicuous, very thin, closely enveloping the ovoid ovary Male flowers numerous, shortly pedicellate, in lax drooping terminal and axillary panicles; tepals free, oblong, spreading or reflexed; anthers at length pendulous
sex Female
Female flowers fewer, in short erect spikes, leafy below, each flower sessile in the axil of an enveloping bracteole and also with a stipule-like bract; perianth inconspicuous, very thin, closely enveloping the ovoid ovary
Morphology Reproductive morphology Fruits
Fruit ovoid, compressed with seed closely conforming to the thin crustaceous pericarp
Morphology Reproductive morphology Seeds
Embryo strongly curved; cotyledons fleshy.

[FZ]

Cannabaceae, C. M. Wilmot-Dear. Flora Zambesiaca 9:6. 1991

Morphology General Habit
Erect annual aromatic herbs, dioecious with male and female plants dimorphic, or rarely monoecious; indumentum of most parts consisting of minute appressed sollen-based hairs; leaves alternate or opposite at the stem base, palmately loheb or digitately compound, leaflets uneven in size, with serrate margins; stipules lateral, persistent.
Morphology Reproductive morphology Inflorescences
Female inflorescences short, compact, not exceeding the leaves; flowers fewer, paired, each subtended by a stipule-like bract and a small green “bracteole” or “calyx” which completely envelopes the ovary and loosely encloses the mature fruit, this enveloping bracteole forming a basally swollen tubular sheath narrowly attenuate at the apex and covered with fine hairs and shortly-stalked or sessile, resinous glands; perianth membranous, undivided, tightly enveloping the ovary and mature fruit (often reduced or absent in cultivated forms), marbled with light and dark areas; stigma-branches densely pubescent, caducous. Male inflorescences laxly cymose-paniculate, bristly-hairy, exceeding the leaves but bearing a few scattered leaves; flowers numerous, shortly pedicellate; perianth lobes free, boat-shaped, spreading or reflexed; stamens pendulous at maturity, filaments short; pistillode 0.
Morphology Reproductive morphology Fruits
Fruit a globular to ovoid achene tightly covered by the thin crustaceous perianth, the reticulate venation of the surface visible beneath the perianth.
Morphology Reproductive morphology Seeds
Embryo strongly curved, cotyledons fleshy.
Note
Easily identified by the light and dark patterning of the perianth layer (where this is present) surrounding the fruit.

Native to:

Afghanistan, Iran, Kazakhstan, Kirgizstan, Pakistan, South European Russi, Tadzhikistan, Turkmenistan, Uzbekistan, Xinjiang

Introduced into:

Alabama, Albania, Algeria, Altay, Amur, Andaman Is., Angola, Arkansas, Assam, Austria, Bangladesh, Belarus, Belgium, Benin, Bolivia, Botswana, Bulgaria, Buryatiya, California, Cambodia, Cameroon, Cape Provinces, Central African Repu, Central European Rus, Chad, China North-Central, China South-Central, China Southeast, Chita, Colombia, Colorado, Connecticut, Corse, Costa Rica, Cuba, Cyprus, Czechoslovakia, Delaware, Denmark, Dominican Republic, East Aegean Is., East European Russia, East Himalaya, Ecuador, Eritrea, Ethiopia, Fiji, Finland, France, Free State, Gambia, Germany, Ghana, Greece, Guinea, Gulf of Guinea Is., Hainan, Haiti, Hawaii, Hungary, Illinois, India, Indiana, Iowa, Iraq, Irkutsk, Italy, Jamaica, Jawa, Kamchatka, Kansas, Kentucky, Kenya, Khabarovsk, Korea, Krasnoyarsk, KwaZulu-Natal, Lebanon-Syria, Leeward Is., Lesotho, Lesser Sunda Is., Magadan, Maine, Malawi, Marquesas, Maryland, Massachusetts, Mauritius, Michigan, Minnesota, Missouri, Morocco, Mozambique, Nebraska, Nepal, New Hampshire, New Jersey, New Mexico, New York, New Zealand North, New Zealand South, Nicaragua, Nicobar Is., North Caucasus, North Dakota, Northern Provinces, Northwest European R, Norway, Ohio, Oklahoma, Ontario, Pennsylvania, Peru, Poland, Primorye, Puerto Rico, Québec, Rhode I., Romania, Rwanda, Réunion, Sakhalin, Sardegna, Senegal, Sicilia, Society Is., South Dakota, Spain, Sudan, Sweden, Switzerland, Tanzania, Tennessee, Tibet, Transcaucasus, Trinidad-Tobago, Tuamotu, Tubuai Is., Turkey, Turkey-in-Europe, Tuva, Uganda, Vermont, Vietnam, Virginia, West Himalaya, West Siberia, West Virginia, Windward Is., Wisconsin, Yakutskiya, Yugoslavia, Zambia, Zaïre, Zimbabwe

Cannabis L. appears in other Kew resources:

First published in Sp. Pl.: 1027 (1753)

Accepted by

  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.

Literature

Flora of West Tropical Africa

  • —F.T.A. 6, 2: 16.

Flora Zambesiaca

  • Gen. Pl. ed. 5: 453 (1754).
  • Sp. Pl. 2: 1027 (1753)

Flora of Tropical East Africa

  • L., Gen. Pl., ed. 5: 453 (1754)
  • Sp. Pl.: 1027 (1753)

Flora Zambesiaca
Flora Zambesiaca
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0