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This genus is accepted, and its native range is New World.
Parthenium hysterophorus

[FTEA]

Compositae, H. Beentje, C. Jeffrey & D.J.N. Hind. Flora of Tropical East Africa. 2005

Morphology General Habit
Herbs or shrubs
Morphology Leaves
Leaves alternate
Morphology Reproductive morphology Inflorescences Capitulum
Capitula in terminal panicles, radiate, heterogamous; involucre with phyllaries in 2–3 series; receptacle paleate
Morphology Reproductive morphology Flowers Florets
Female florets with minute rays; disc florets infundibuliform; anthers with apical appendage, obtuse at base; style of ray florets bifid, of disc florets entire and obtuse
sex Female
Female florets with minute rays; disc florets infundibuliform; anthers with apical appendage, obtuse at base; style of ray florets bifid, of disc florets entire and obtuse
Morphology Reproductive morphology Fruits
Achenes of ray florets compressed, keeled, enveloped by phyllary and two paleae; pappus of 2 recurved awns enclosed in the paleae.

Native to:

Alabama, Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Arkansas, Aruba, Bahamas, Belize, Bolivia, Brazil North, Brazil Northeast, Brazil Southeast, Brazil West-Central, Cayman Is., Colombia, Colorado, Connecticut, Costa Rica, Cuba, Ecuador, French Guiana, Georgia, Guatemala, Guyana, Honduras, Illinois, Indiana, Iowa, Jamaica, Kansas, Kentucky, Leeward Is., Louisiana, Maryland, Massachusetts, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Netherlands Antilles, Nevada, New Mexico, New York, Nicaragua, North Carolina, Ohio, Oklahoma, Panamá, Paraguay, Pennsylvania, Puerto Rico, South Carolina, Suriname, Tennessee, Texas, Trinidad-Tobago, Turks-Caicos Is., Uruguay, Utah, Venezuela, Venezuelan Antilles, Virginia, West Virginia, Windward Is., Wisconsin, Wyoming

Introduced into:

Assam, Bangladesh, Cambodia, Cape Verde, China South-Central, China Southeast, Comoros, Delaware, District of Columbia, Dominican Republic, East Himalaya, Eritrea, Ethiopia, Florida, Haiti, Hawaii, India, Japan, Korea, Krym, KwaZulu-Natal, Laos, Madagascar, Marquesas, Mauritius, Mozambique, Nansei-shoto, Nepal, New Caledonia, New Jersey, New South Wales, Northern Provinces, Northern Territory, Oman, Palestine, Poland, Queensland, Rodrigues, Réunion, Seychelles, Society Is., Swaziland, Tadzhikistan, Taiwan, Thailand, Transcaucasus, Ukraine, Vietnam, Zimbabwe

Parthenium L. appears in other Kew resources:

First published in Sp. Pl.: 988 (1753)

Accepted by

  • Roskov Y. & al. (eds.) (2018). Species 2000 & ITIS Catalogue of Life Naturalis, Leiden, the Netherlands.

Literature

Flora of Tropical East Africa

  • Sp. Pl.: 988 (1753)

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