Taxon:  Ageratina riparia (Regel) R. M. King & H. Rob.



Summary
Genus:
Ageratina
Family:
Asteraceae (alt. Compositae)
Subfamily:
Asteroideae
Tribe:
Eupatorieae
Subtribe:
Oyxlobinae
Nomen number:
317712
Place of publication:
Phytologia 19:216.  1970
Verified:
09/29/1992 ARS Systematic Botanists.
Accessions:
0 (0  active, 0  available) in National Plant Germplasm System. 
Other conspecific taxa
Autonyms (not in current use), synonyms and invalid designations
Basionym
Eupatorium riparium Regel

Images (2 total. Click on image for more.)
Embryo drawing

Conservation Status

Reference(s)
  1. University of Georgia Center for Invasive Species and Ecosystem Health
  2. Allan, H. H. B. et al. 1961-. Flora of New Zealand.
  3. APHIS. Agricultural Risk Management System United States Department of Agriculture.
  4. Barreto, R. W. & H. C. Evans. 1988. Taxonomy of a fungus introduced into Hawaii for biological control of Ageratina riparia (Eupatorieae; Compositae), with observations on related weed pathogens. Trans. Brit. Mycol. Soc. 91:81-97.
  5. Bosser, J. M. et al., eds. 1976-. Flores des Mascareignes.
  6. Erhardt, W. et al. 2008. Der große Zander: Enzyklopädie der Pflanzennamen 2:1186.
  7. Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource).
  8. Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa.
  9. Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
  10. Henderson, L. 2001. Alien weeds and invasive plants: a complete guide to declared weeds and invaders in South Africa. Plant Protection Research Institute, Handbook 12
  11. Hnatiuk, R. J. 1990. Census of Australian vascular plants. Australian Flora and Fauna Series No. 11.
  12. Holm, L. et al. 1979. A geographical atlas of world weeds
  13. King, R. M. & H. Robinson. 1987. The genera of the Eupatorieae (Asteraceae). Monogr. Syst. Bot. Missouri Bot. Gard. 22.
  14. Lazarides, M. & B. Hince. 1993. CSIRO Handbook of Economic Plants of Australia
  15. Parsons, W. T. & E. G. Cuthbertson. 1992. Noxious weeds of Australia Inkata Press, Melbourne, Australia.
  16. Plant Protection and Quarantine Office. United States Department of Agriculture, Animal and Plant Health Inspection Service. Federal noxious weed list (on-line resource).
  17. Seed Regulatory and Testing Division, Agricultural Marketing Service, U.S.D.A. State noxious-weed seed requirements recognized in the administration of the Federal Seed Act (updated annually).
  18. Turner, B. L. 1996-. The comps of Mexico - a systematic account of the family Asteraceae. Phytologia Memoirs.
  19. Wagner, W. L. et al. 1990. Manual of the flowering plants of Hawai'i
  20. Weber, E. 2003. Invasive plant species of the world: a reference guide to environmental weeds
Common names
LanguageNameAlternate namenoteseqCitation
Englishcreeping croftonweed  1Parsons, W. T. & E. G. Cuthbertson. 1992. Noxious weeds of Australia Inkata Press, Melbourne, Australia.
Englishmistflower  1Lazarides, M. & B. Hince. 1993. CSIRO Handbook of Economic Plants of Australia
Englishriver-eupatorium  1Parsons, W. T. & E. G. Cuthbertson. 1992. Noxious weeds of Australia Inkata Press, Melbourne, Australia.
Englishspreading snakeroot  1Erhardt, W. et al. 2008. Der große Zander: Enzyklopädie der Pflanzennamen 2:1186.
Afrikaansmistblom  2Henderson, L. 2001. Alien weeds and invasive plants: a complete guide to declared weeds and invaders in South Africa. Plant Protection Research Institute, Handbook 12
Germanwuchernde Natternwurz  2Erhardt, W. et al. 2008. Der große Zander: Enzyklopädie der Pflanzennamen 2:1186.
Hawaiianhamakua pamakani  2Wagner, W. L. et al. 1990. Manual of the flowering plants of Hawai'i
Distribution
order_codeStatusContinentSubcontinentCountryStateNoteReference
1NativeNorthern AmericaSouthern MexicoMexicoMichoacán de Ocampo Turner, B. L. 1996-. The comps of Mexico - a systematic account of the family Asteraceae. Phytologia Memoirs.
1NativeNorthern AmericaSouthern MexicoMexicoVeracruz de Ignacio de la Llave Barreto, R. W. & H. C. Evans. 1988. Taxonomy of a fungus introduced into Hawaii for biological control of Ageratina riparia (Eupatorieae; Compositae), with observations on related weed pathogens. Trans. Brit. Mycol. Soc. 91:81-97.
2Cultivated    cult. in tropicsHanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
4NaturalizedAfricaMacaronesiaPortugalMadeira Islands Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource).
4NaturalizedAfricaMacaronesiaSpainCanarias Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource).
4NaturalizedAfricaSouthern AfricaSouth AfricaKwaZulu-Natal Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa.
4NaturalizedAfricaWestern Indian OceanMauritius  Bosser, J. M. et al., eds. 1976-. Flores des Mascareignes.
4NaturalizedAfricaWestern Indian OceanReunion  Bosser, J. M. et al., eds. 1976-. Flores des Mascareignes.
4NaturalizedAsia-TropicalIndian SubcontinentIndiaMeghalaya Sharma, B. D. et al., eds. 1993-. Flora of India.
4NaturalizedAsia-TropicalIndian SubcontinentIndiaUttar Pradesh Sharma, B. D. et al., eds. 1993-. Flora of India.
4NaturalizedAsia-TropicalIndian SubcontinentSri Lanka  Dassanayake, M. D. & F. R. Fosberg, eds. 1980-. A revised handbook to the flora of Ceylon.
4NaturalizedAsia-TropicalMalesiaIndonesia  Backer, C. A. & R. C. Bakhuizen van den Brink, Jr. 1963-1968. Flora of Java.
4NaturalizedAustralasiaAustraliaAustralia  Hnatiuk, R. J. 1990. Census of Australian vascular plants. Australian Flora and Fauna Series No. 11.
4NaturalizedAustralasiaNew ZealandNew Zealand  Allan, H. H. B. et al. 1961-. Flora of New Zealand.
4NaturalizedPacificNorth-Central PacificUnited StatesHawaii Wagner, W. L. et al. 1990. Manual of the flowering plants of Hawai'i
4NaturalizedSouthern AmericaCaribbeanCuba  León (J. S. Sauget) & Alain (E. E. Liogier). 1946-1969. Flora de Cuba
4NaturalizedSouthern AmericaCaribbeanJamaica  Adams, C. 1972. Flowering plants of Jamaica
4NaturalizedSouthern AmericaWestern South AmericaPeru  King, R. M. & H. Robinson. 1987. The genera of the Eupatorieae (Asteraceae). Monogr. Syst. Bot. Missouri Bot. Gard. 22.
6Other    native status in Mexico supported from biocontrol studiesBarreto, R. W. & H. C. Evans. 1988. Taxonomy of a fungus introduced into Hawaii for biological control of Ageratina riparia (Eupatorieae; Compositae), with observations on related weed pathogens. Trans. Brit. Mycol. Soc. 91:81-97.
Native
Northern America
  • SOUTHERN MEXICO: Mexico [Michoacán de Ocampo, Veracruz de Ignacio de la Llave]
Cultivated (cult. in tropics)
Naturalized
Africa
  • MACARONESIA: Spain [Canarias], Portugal [Madeira Islands]
  • SOUTHERN AFRICA: South Africa [KwaZulu-Natal]
  • WESTERN INDIAN OCEAN: Mauritius, Reunion
Asia-Tropical
  • INDIAN SUBCONTINENT: India [Meghalaya, Uttar Pradesh], Sri Lanka
  • MALESIA: Indonesia
Australasia
  • AUSTRALIA: Australia
  • NEW ZEALAND: New Zealand
Pacific
  • NORTH-CENTRAL PACIFIC: United States [Hawaii]
Southern America
  • CARIBBEAN: Cuba, Jamaica
  • WESTERN SOUTH AMERICA: Peru
Other (native status in Mexico supported from biocontrol studies)

Reference(s)
  1. Adams, C. 1972. Flowering plants of Jamaica
  2. Allan, H. H. B. et al. 1961-. Flora of New Zealand.
  3. Backer, C. A. & R. C. Bakhuizen van den Brink, Jr. 1963-1968. Flora of Java.
  4. Barreto, R. W. & H. C. Evans. 1988. Taxonomy of a fungus introduced into Hawaii for biological control of Ageratina riparia (Eupatorieae; Compositae), with observations on related weed pathogens. Trans. Brit. Mycol. Soc. 91:81-97.
  5. Bosser, J. M. et al., eds. 1976-. Flores des Mascareignes.
  6. Dassanayake, M. D. & F. R. Fosberg, eds. 1980-. A revised handbook to the flora of Ceylon.
  7. Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource).
  8. Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa.
  9. Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
  10. Hnatiuk, R. J. 1990. Census of Australian vascular plants. Australian Flora and Fauna Series No. 11.
  11. King, R. M. & H. Robinson. 1987. The genera of the Eupatorieae (Asteraceae). Monogr. Syst. Bot. Missouri Bot. Gard. 22.
  12. León (J. S. Sauget) & Alain (E. E. Liogier). 1946-1969. Flora de Cuba
  13. Sharma, B. D. et al., eds. 1993-. Flora of India.
  14. Turner, B. L. 1996-. The comps of Mexico - a systematic account of the family Asteraceae. Phytologia Memoirs.
  15. Wagner, W. L. et al. 1990. Manual of the flowering plants of Hawai'i
Economic Uses
UsageTypeNoteReference
Environmentalerosion control Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Environmentalornamental Weber, E. 2003. Invasive plant species of the world: a reference guide to environmental weeds
Vertebrate poisonsmammalsas Eupatorium ripariumConnor, H. E. 1992. The poisonous plants of New Zealand.
Weedseed contaminantpotentialParsons, W. T. & E. G. Cuthbertson. 1992. Noxious weeds of Australia Inkata Press, Melbourne, Australia.
Weedseed contaminantpotentialWeber, E. 2003. Invasive plant species of the world: a reference guide to environmental weeds
Weedseed contaminantpotentialHenderson, L. 2001. Alien weeds and invasive plants: a complete guide to declared weeds and invaders in South Africa. Plant Protection Research Institute, Handbook 12
Cite as: USDA, Agricultural Research Service, National Plant Germplasm System. 2026. Germplasm Resources Information Network (GRIN Taxonomy). National Germplasm Resources Laboratory, Beltsville, Maryland.
URL: https://npgstest.ars-grin.gov/gringlobal/taxon/taxonomydetail?id=317712. Accessed 11 May 2026.