Taxon: Ageratina altissima (L.) R. M. King & H. Rob.

Summary

Genus:

Ageratina

Family:

Asteraceae (alt. Compositae)

Subfamily:

Asteroideae

Tribe:

Eupatorieae

Subtribe:

Oyxlobinae

Nomen number:

317713

Place of publication:

Phytologia 19:212. 1970

Protologue link:

https://biodiversitylibrary.org/page/13020680

Comment:

based on Ageratum altissimum L., non Eupatorium altissimum L.

Verified:

09/29/1992 ARS Systematic Botanists.

Accessions:

9 (9 active, 3 available) in National Plant Germplasm System. (Map it)

Other conspecific taxa

Ageratina altissima (L.) R. M. King & H. Rob. var. altissima (2 active accession[s])
Ageratina altissima (L.) R. M. King & H. Rob. var. roanensis (Small) Clewell & Wooten (0 active accession[s])

Autonyms (not in current use), synonyms and invalid designations

Basionym
Ageratum altissimum L.

Heterotypic Synonym(s)
Eupatorium rugosum Houtt.

No images

Links

Forestry Images – from www.forestryimages.org

Conservation Status

Reference(s)

Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
APHIS. Agricultural Risk Management System United States Department of Agriculture.
Correll, D. S. & M. C. Johnston. 1970. Manual of the vascular plants of Texas Note: = Eupatorium rugosum
Darbyshire, S. J. 2003. Inventory of Canadian Agricultural Weeds Agriculture and Agri-Food Canada. 240.
Der Marderosian, A. & L. Liberti. 1988. Natural product medicine: a scientific guide to foods, drugs, cosmetics
Erhardt, W. et al. 2008. Der große Zander: Enzyklopädie der Pflanzennamen 2:1186.
Everest, S. L. 1981. Poisonous plants of Australia. Note: poisonous
FNA Editorial Committee. 1993-. Flora of North America.
Gleason, H. A. & A. Cronquist. 1991. Manual of vascular plants of northeastern United States and adjacent Canada, ed. 2 Note: = Eupatorium rugosum
King, R. M. & H. Robinson. 1987. The genera of the Eupatorieae (Asteraceae). Monogr. Syst. Bot. Missouri Bot. Gard. 22.
Kingsbury, J. M. 1964. Poisonous plants of the United States and Canada. 397-404. Note: = Eupatorium rugosum
Lampe, K. F. & M. A. McCann. 1985. AMA handbook of poisonous and injurious plants Note: poisonous
Magee, D. W. & H. E. Ahles. 1999. Flora of the Northeast. A manual of the vascular flora of New England and adjacent New York.
McGregor, R. L. et al. (The Great Plains Flora Association). 1977. Atlas of the Flora of the Great Plains.
McGregor, R. L. et al. (The Great Plains Flora Association). 1986. Flora of the Great Plains. Note: = Eupatorium rugosum
Radford, A. E. et al., eds. 1980-. Vascular flora of the southeastern United States. Note: = Eupatorium rugosum
Scoggan, H. J. 1978-1979. The flora of Canada, 4 vol. Note: = Eupatorium rugosum
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).
Wofford, B. E. Database of Tennessee vascular plants (on-line resource).

Common names

Language	Name	note	seq	Citation
English	richweed		1	Der Marderosian, A. & L. Liberti. 1988. Natural product medicine: a scientific guide to foods, drugs, cosmetics
English	snakeroot		1	Der Marderosian, A. & L. Liberti. 1988. Natural product medicine: a scientific guide to foods, drugs, cosmetics
English	white snakeroot		1	Wiersema, J. H. & B. León. 1999. World economic plants: a standard reference CRC Press, Boca Raton, FL.
English (Canada)	white snakeroot	Agriculture & Agri-Food Canada official name	2	Darbyshire, S. J. 2003. Inventory of Canadian Agricultural Weeds Agriculture and Agri-Food Canada. 240.
French	eupatoire à feuilles molles		2	Erhardt, W. et al. 2008. Der große Zander: Enzyklopädie der Pflanzennamen 2:1186.
French	eupatoire rugueuse		2	FNA Editorial Committee. 1993-. Flora of North America.
French (Canada)	eupatoire rugueuse	Agriculture & Agroalimentaire Canada nom officiel	2	Darbyshire, S. J. 2003. Inventory of Canadian Agricultural Weeds Agriculture and Agri-Food Canada. 240.
German	weiße Natternwurz		2	Erhardt, W. et al. 2008. Der große Zander: Enzyklopädie der Pflanzennamen 2:1186.
Swedish	rostflockel		2	Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)

Distribution

order_code	Status	Continent	Subcontinent	Country	State	Note	Reference
1	Native	Northern America	Eastern Canada	Canada	New Brunswick		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Eastern Canada	Canada	Nova Scotia		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Eastern Canada	Canada	Ontario		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Eastern Canada	Canada	Québec		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	North-Central U.S.A.	United States	Illinois		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	North-Central U.S.A.	United States	Iowa		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	North-Central U.S.A.	United States	Kansas	e.	FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	North-Central U.S.A.	United States	Minnesota		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	North-Central U.S.A.	United States	Missouri		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	North-Central U.S.A.	United States	Nebraska	e.	FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	North-Central U.S.A.	United States	North Dakota	e.	FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	North-Central U.S.A.	United States	Oklahoma		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	North-Central U.S.A.	United States	South Dakota	e.	FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	North-Central U.S.A.	United States	Wisconsin		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	Connecticut		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	Indiana		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	Maine		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	Massachusetts		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	Michigan		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	New Hampshire		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	New Jersey		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	New York		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	Ohio		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	Pennsylvania		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	Rhode Island		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	Vermont		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northeastern U.S.A.	United States	West Virginia		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	South-Central U.S.A.	United States	Texas	e.	FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Alabama		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Arkansas		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Delaware		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Florida	n.	FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Georgia		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Kentucky		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Louisiana		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Maryland		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Mississippi		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	North Carolina		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	South Carolina		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Tennessee		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Virginia		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Western Canada	Canada	Saskatchewan		FNA Editorial Committee. 1993-. Flora of North America.

Native
Northern America

EASTERN CANADA: Canada [New Brunswick, Nova Scotia, Ontario, Québec]
WESTERN CANADA: Canada [Saskatchewan]
NORTHEASTERN U.S.A.: United States [Connecticut, Indiana, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia]
NORTH-CENTRAL U.S.A.: United States [Illinois, Iowa, Kansas (e.), Minnesota, Missouri, Nebraska (e.), North Dakota (e.), Oklahoma, South Dakota (e.), Wisconsin]
SOUTHEASTERN U.S.A.: United States [Alabama, Arkansas, Delaware, Florida (n.), Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Tennessee, Virginia]
SOUTH-CENTRAL U.S.A.: United States [Texas (e.)]

Reference(s)

FNA Editorial Committee. 1993-. Flora of North America.

Economic Uses

Usage	Type	Note	Reference
Vertebrate poisons	mammals		Magee, D. W. & H. E. Ahles. 1999. Flora of the Northeast. A manual of the vascular flora of New England and adjacent New York.
Vertebrate poisons	mammals		Everest, S. L. 1981. Poisonous plants of Australia. Note: poisonous
Vertebrate poisons	mammals	as Eupatorium rugosum	Der Marderosian, A. & L. Liberti. 1988. Natural product medicine: a scientific guide to foods, drugs, cosmetics
Vertebrate poisons	mammals	as Eupatorium rugosum	Lampe, K. F. & M. A. McCann. 1985. AMA handbook of poisonous and injurious plants Note: poisonous
Vertebrate poisons	mammals	as Eupatorium rugosum	Kingsbury, J. M. 1964. Poisonous plants of the United States and Canada. 397-404. Note: = Eupatorium rugosum
Weed			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).

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=317713. Accessed 14 April 2026.