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

• Check PlantSearch database of Botanic Gardens Conservation International for possible non-NPGS germplasm.

A declared noxious weed by USDA-APHIS.

A declared aquatic or terrestrial noxious weed and/or noxious-weed seed in these U.S. states (see state noxious weed lists), with links to state information or web documents:

AL*, HI*°.

ªAquatic.

*Terrestrial.

°In seed.

Link to noxious weed information from

Common names:

• creeping croftonweed   (Source: Noxweed Aust ) – English
  
• mistflower   (Source: Econ Pl Aust ) – English
  
• river-eupatorium   (Source: Noxweed Aust ) – English
  
• spreading snakeroot   (Source: Zander Ency ) – English
  
• mistblom   (Source: Weeds SAfr 2001 ) – Afrikaans
  
• wuchernde Natternwurz   (Source: Zander Ency ) – German
  
• hamakua pamakani   (Source: F Hawaii ) – Hawaiian
  

Economic importance:

• Environmental: erosion control   (fide Mansf Ency)
  
• Environmental: ornamental   (fide Invasive Pl Spec)
  
• Vertebrate poisons: mammals   (fide Connor, as Eupatorium riparium)
  
• Weed: potential seed contaminant   (fide Noxweed Aust; Invasive Pl Spec; Weeds SAfr 2001)
  

More:

View toxicology references for Ageratina riparia from FDA Poisonous Plant Database

Distributional range:

• NORTHERN AMERICA
  Southern Mexico: Mexico - Michoacan, Veracruz

• AFRICA
  Macaronesia: Portugal - Madeira Islands; Spain - Canary 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

• cultivated in tropics

• native status in Mexico supported from biocontrol studies

References:

• Allan, H. H. B. et al. 1961–. Flora of New Zealand.
• 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.
• Bosser, J. M. et al., eds. 1976–. Flores des Mascareignes.
• Erhardt, W. et al. 2008. Der große Zander: Enzyklopädie der Pflanzennamen.
• Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource).
• Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14.
• Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6.
• 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.
• Hnatiuk, R. J. 1990. Census of Australian vascular plants. Australian Flora and Fauna Series No. 11.
• Holm, L. et al. 1979. A geographical atlas of world weeds.
• King, R. M. & H. Robinson. 1987. The genera of the Eupatorieae (Asteraceae). Monogr. Syst. Bot. Missouri Bot. Gard. 22.
• Lazarides, M. & B. Hince. 1993. CSIRO Handbook of Economic Plants of Australia.
• Parsons, W. T. & E. G. Cuthbertson. 1992. Noxious weeds of Australia.
• Seed Regulatory and Testing Branch, Agricultural Marketing Service, U.S.D.A. 1999. State noxious-weed seed requirements recognized in the administration of the Federal Seed Act.
• Turner, B. L. 1996–. The comps of Mexico - a systematic account of the family Asteraceae. Phytologia Memoirs.
• Wagner, W. L. et al. 1990. Manual of the flowering plants of Hawai'i.
• Weber, E. 2003. Invasive plant species of the world: a reference guide to environmental weeds.

More:

Search AGRICOLA article citation database for citations referencing Ageratina riparia.

Search NCBI's Entrez search engine for PubMed citations referencing Ageratina riparia.

Search Biodiversity Heritage Library for historical publications referencing Ageratina riparia.

Synonyms:

• (≡) Eupatorium riparium Regel (basionym)
  

Check other web resources for Ageratina riparia (Regel) R. M. King & H. Rob.:

• PLANTS: USDA-NRCS Database of Plants of the United States and its Territories
• BONAP: North American Plant Atlas of the Biota of North America Program
• AVH: Australia's Virtual Herbarium
• SIBIS: South African National Biodiversity Institute's (SANBI) Integrated Biodiversity System
• TROPICOS: Nomenclatural and Specimen Database of the Missouri Botanical Garden
• Mansfeld: Mansfeld's World Database of Agricultural and Horticultural Crops
• ePIC: Electronic Plant Information Centre of Royal Botanic Gardens, Kew
• AGRICOLA: Article Citation Database or NAL Catalog of USDA's National Agricultural Library
• Entrez: NCBI's search engine for PubMed citations, GenBank sequences, etc.

Images:

• Disseminule drawings: U.S. National Seed Herbarium drawing
• Embryo drawing: U.S. National Seed Herbarium drawing

More:

• Check PlantSystematics.org for additional images
• Images Note: Be advised that their identity may be inaccurate. Proper identification of a plant may require specialized taxonomic knowledge or comparison with properly documented herbarium material.

Abbreviations & symbols in GRIN Taxonomy

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