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This genus is accepted, and its native range is Tropical America.

[FSOM]

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

Morphology General Habit
Annual herbs, dichotomously branched
Morphology Leaves
Leaves simple and opposite
Morphology Reproductive morphology Inflorescences
Capitula in cymes, radiate
Morphology Reproductive morphology Inflorescences Bracts Phyllaries
Phyllaries in two rows, the inner row forming an involucre with straight or hooked spines
Morphology Reproductive morphology Flowers Florets
Ray florets 5–8, small, female, each enclosed in a phyllary or bract that hardens in fruit; disk florets functionally male, surrounded by soft bracts/paleae
Morphology Reproductive morphology Fruits
Achenes enclosed by the hardened involucre; pappus absent.
Distribution
Seven species in Central and South America, one pantropical weed.

[FTEA]

Compositae, H.J. Beentje. Flora of Tropical East Africa. 2002

Morphology General Habit
Annual or perennial herbs
Morphology Leaves
Leaves opposite
Morphology Reproductive morphology Inflorescences Capitulum
Capitula solitary, axillary or in branch forks, sessile or shortly stalked, heterogamous, radiate, enlarging in fruit; involucre of two series, the outer herbaceous, the inner closely enveloping the outer florets; receptacle paleate
Morphology Reproductive morphology Flowers Florets
Inner florets bisexual but functionally male, campanulate or infundibuliform; style branches connate, club-shaped; anthers with truncate bases and ovate apical appendix Outer florets female, radiate with small ray; style branches strongly divergent, linear and obtuse
Morphology Reproductive morphology Fruits
Achenes of the female florets covered by the indurate and echinate phyllaries, the achene itself smooth; achenes in disc florets abortive; pappus absent.

Native to:

Argentina Northeast, Argentina Northwest, Bahamas, Bolivia, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, French Guiana, Galápagos, Guatemala, Guyana, Haiti, Honduras, Jamaica, Leeward Is., Netherlands Antilles, Nicaragua, Panamá, Paraguay, Peru, Puerto Rico, Suriname, Trinidad-Tobago, Uruguay, Venezuela, Venezuelan Antilles, Windward Is.

Introduced into:

Alabama, Angola, Arkansas, Assam, Bangladesh, Belgium, Benin, Botswana, Burkina, Cameroon, Cape Provinces, Cape Verde, Central African Repu, Chad, China South-Central, China Southeast, Comoros, Congo, East Himalaya, Eritrea, Ethiopia, Florida, Free State, Gabon, Georgia, Guinea-Bissau, Gulf of Guinea Is., Hawaii, India, Ivory Coast, KwaZulu-Natal, Laccadive Is., Lesotho, Liberia, Louisiana, Madagascar, Malaya, Maldives, Mali, Marquesas, Massachusetts, Mauritania, Mauritius, Mississippi, Mozambique, Namibia, Nepal, New Guinea, New Jersey, New South Wales, New York, North Carolina, Northern Provinces, Northern Territory, Oman, Ontario, Oregon, Pennsylvania, Philippines, Primorye, Queensland, Rodrigues, Réunion, Socotra, South Carolina, Sri Lanka, Sudan, Swaziland, Tennessee, Texas, Thailand, Togo, Virginia, West Himalaya, Western Australia, Zambia, Zaïre, Zimbabwe

Acanthospermum Schrank appears in other Kew resources:

First published in Pl. Rar. Hort. Monac.: t. 53 (1820)

Accepted by

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

Literature

Catálogo de Plantas y Líquenes de Colombia

  • 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

  • —Benth. & Hook. f. Gen. Pl. 2: 349.

Flora of Somalia

  • Flora Somalia, (2000) Author: by H. Beentje. [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • D.J.N. Hind in Fl. Masc. 109: 170 (1993)
  • Pl. Rar. Hort. Monac.: t. 53 (1819)

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