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This genus is accepted, and its native range is Cosmopolitan.

[FZ]

Amaranthaceae, C. C. Townsend. Flora Zambesiaca 9:1. 1988

Morphology General Habit
Annual or more rarely perennial herbs, glabrous or furnished with short and gland-like or multicellular hairs.
Morphology Leaves
Leaves alternate, long-petiolate, simple and entire or sinuate.
Morphology Reproductive morphology Inflorescences
Inflorescence basically cymose, bracteate, consisting entirely of dense to lax axillary clusters or the upper clusters leafless and more or less approximate to form a lax or dense “spike” or panicle.
Morphology Reproductive morphology Flowers
Flowers monoecious or (not in Africa) dioecious, bibracteolate.
Morphology Reproductive morphology Flowers Perianth
Perianth segments (2) 3–5, free or connate at the base, membranous, those of the female flowers sometimes slightly accrescent in fruit.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens free, usually similar in number to the perianth segments; anthers bilocular.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigmas 2–3.
Morphology Reproductive morphology Flowers Gynoecium Ovary Ovules
Ovule solitary, erect.
Morphology Reproductive morphology Fruits
Fruit a dry capsule, indehiscent, irregularly rupturing or commonly dehiscing by a circumcissile lid.
Morphology Reproductive morphology Seeds
Seeds usually black and shining, testa thin; embryo annular, endosperm present.

[FSOM]

M. Thulin et al. Flora of Somalia Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Annual or more rarely perennial herbs, glabrous or furnished with short and gland-like or multicellular hairs
Morphology Leaves
Leaves alternate, long-petiolate, entire or sinuate
Morphology Reproductive morphology Inflorescences
Inflorescence basically cymose, bracteate, formed of dense to lax axillary clusters or the upper clusters leafless and ± approximate to form a dense or lax “spike” or panicle
Morphology Reproductive morphology Flowers
Flowers dioecious (not in Somalia) or monoecious
Morphology Reproductive morphology Flowers Tepal
Tepals (2–)3–5, free or almost so, those of the female flowers somewhat accrescent in fruit
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens usually isomerous with the tepals, free
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary 1-ovulate
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigmas 2–3
Morphology Reproductive morphology Fruits
Fruit a dry, indehiscent, irregularly rupturing or circumscissile capsule
Morphology Reproductive morphology Seeds
Seed usually compressed, black and shining.
Distribution
About 100 species, chiefly in the tropical to warm temperate regions of the world, occurring as casual weeds in cooler temperate regions.

[FTEA]

Amaranthaceae, C.C. Townsend. Flora of Tropical East Africa. 1985

Morphology General Habit
Annual or more rarely perennial herbs, glabrous or furnished with short and gland-like or multicellular hairs, dioecious (not in E. Africa) or monoecious
Morphology Leaves
Leaves alternate, long-petiolate, simple and entire or sinuate
Morphology Reproductive morphology Inflorescences
Inflorescence basically cymose, bracteate, consisting entirely of dense to lax axillary clusters or the upper clusters leafless and ± approximate to form a lax or dense “spike” or panicle
Morphology Reproductive morphology Flowers
Flowers bibracteolate; perianth-segments (2–)3–5, free or connate at the base, membranous, those of ♀ slightly accrescent in fruit
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens free, usually similar in number to the perianth-segments; anthers bilocular
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigmas 2–3; ovule solitary, erect
Morphology Reproductive morphology Fruits
Fruit a dry capsule, indehiscent, irregularly rupturing or commonly dehiscing by a circumscissile lid
Morphology Reproductive morphology Seeds
Seeds usually black and shining; testa thin; embryo annular, endosperm present.

Native to:

Afghanistan, Alabama, Albania, Alberta, Algeria, Altay, Angola, Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Arkansas, Aruba, Assam, Austria, Azores, Bahamas, Baleares, Bangladesh, Belize, Benin, Bolivia, Borneo, Botswana, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Bulgaria, Burkina, California, Cameroon, Canary Is., Cape Provinces, Cape Verde, Cayman Is., Central African Repu, Chad, Chile Central, Chile North, Chile South, China North-Central, China South-Central, China Southeast, Colombia, Colorado, Congo, Connecticut, Costa Rica, Cuba, Cyprus, Delaware, District of Columbia, Djibouti, Dominican Republic, East Aegean Is., East Himalaya, Ecuador, Egypt, El Salvador, Eritrea, Ethiopia, Florida, France, Free State, French Guiana, Galápagos, Georgia, Ghana, Greece, Guatemala, Gulf of Guinea Is., Gulf States, Guyana, Haiti, Hawaii, Honduras, Hungary, Idaho, Illinois, India, Indiana, Inner Mongolia, Iowa, Iran, Iraq, Italy, Ivory Coast, Jamaica, Jawa, Kansas, Kazakhstan, Kentucky, Kenya, Kriti, Krym, Kuwait, KwaZulu-Natal, Laos, Lebanon-Syria, Leeward Is., Lesotho, Lesser Sunda Is., Liberia, Libya, Line Is., Louisiana, Madeira, Maine, Malawi, Malaya, Mali, Maluku, Maryland, Massachusetts, Mauritania, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Mongolia, Montana, Morocco, Mozambique, Myanmar, Namibia, Nebraska, Nepal, Netherlands Antilles, Nevada, New Guinea, New Hampshire, New Jersey, New Mexico, New South Wales, New York, Nicaragua, Niger, Nigeria, North Carolina, North Caucasus, North Dakota, Northern Provinces, Northern Territory, Ogasawara-shoto, Ohio, Oklahoma, Oman, Ontario, Oregon, Pakistan, Palestine, Panamá, Paraguay, Pennsylvania, Peru, Philippines, Portugal, Puerto Rico, Queensland, Rhode I., Romania, Rwanda, Sardegna, Saskatchewan, Saudi Arabia, Senegal, Sicilia, Sinai, Socotra, Solomon Is., Somalia, South Australia, South Carolina, South Dakota, Southwest Caribbean, Spain, Sri Lanka, Sudan, Sulawesi, Sumatera, Suriname, Swaziland, Tadzhikistan, Tanzania, Tennessee, Texas, Thailand, Togo, Transcaucasus, Trinidad-Tobago, Tunisia, Turkey, Turkey-in-Europe, Turkmenistan, Turks-Caicos Is., Uganda, Uruguay, Utah, Uzbekistan, Venezuela, Venezuelan Antilles, Vermont, Victoria, Vietnam, Virginia, Washington, West Himalaya, Western Australia, Windward Is., Wisconsin, Wyoming, Xinjiang, Yemen, Yugoslavia, Zambia, Zaïre, Zimbabwe

Introduced into:

Alaska, Aldabra, Amur, Andaman Is., Ascension, Baltic States, Belarus, Belgium, Bermuda, British Columbia, Burundi, Cambodia, Caroline Is., Central European Rus, Chagos Archipelago, Chita, Christmas I., Comoros, Cook Is., Corse, Czechoslovakia, Denmark, East European Russia, Fiji, Finland, Gabon, Gambia, Germany, Gilbert Is., Great Britain, Guinea, Guinea-Bissau, Hainan, Ireland, Irkutsk, Japan, Juan Fernández Is., Kazan-retto, Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Kuril Is., Labrador, Laccadive Is., Maldives, Manchuria, Manitoba, Marianas, Marquesas, Marshall Is., Mauritius, Mexican Pacific Is., Nansei-shoto, Nauru, Netherlands, New Brunswick, New Caledonia, New Zealand North, New Zealand South, Newfoundland, Nicobar Is., Niue, Norfolk Is., North European Russi, Northwest European R, Northwest Territorie, Norway, Nova Scotia, Nunavut, Phoenix Is., Pitcairn Is., Poland, Primorye, Prince Edward I., Qinghai, Québec, Rodrigues, Réunion, Samoa, Seychelles, Sierra Leone, Society Is., South China Sea, South European Russi, St.Helena, Sweden, Switzerland, Taiwan, Tasmania, Tibet, Tokelau-Manihiki, Tonga, Tristan da Cunha, Tuamotu, Tubuai Is., Tuva, Ukraine, Vanuatu, Wake I., West Siberia, West Virginia, Western Sahara, Yakutskiya

Amaranthus L. appears in other Kew resources:

First published in Sp. Pl.: 989 (1753)

Accepted by

  • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 529. MIM, Deurne.

Literature

Catálogo de Plantas y Líquenes de Colombia

  • ColPlantA (2021). "ColPlantA. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://www.colplanta.org/"
  • WCVP (2021). World Checklist of Vascular Plants, version 2.0. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://wcvp.science.kew.org/ Retrieved 28 April 2021

Flora of West Tropical Africa

  • Thellung in Asch. & Grabner Synopsis 5, 1: 225–356 (1914).
  • —F.T.A. 6, 1: 30

Flora Zambesiaca

  • Brenan, “The genus Amaranthus in Southern Africa”, Journ. S. Afr. Bot. 47: 451–492 (1981).
  • Sp. Pl. 2: 989 (1753)

Flora of Somalia

  • Aellen in Hegi, Ill. Fl. Mitteleur. 3,2: 465–516 (1959)
  • Flora Somalia, Vol 1, (1993) Author: by C. C. Townsend [updated by M. Thulin 2008]
  • Townsend in Publ. Cairo Univ. Herb. 7 & 8: 63–66 (1977).

Flora of Tropical East Africa

  • L., Gen. Pl., ed. 5: 427 (1754)
  • Sp. Pl.: 989 (1753)

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

Flora of Somalia
Flora of Somalia
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