Taxon: Justicia americana (L.) Vahl

Summary

Genus:

Justicia

Family:

Acanthaceae

Subfamily:

Acanthoideae

Tribe:

Justicieae

Nomen number:

465632

Place of publication:

Symb. bot. 2:15. 1791

Verified:

07/27/2012 ARS Systematic Botanists.

Accessions:

1 (1 active, 0 available) in National Plant Germplasm System. (Map it)

Other conspecific taxa

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

Basionym
Dianthera americana L.

No images

Conservation Status

Reference(s)

Crow, G. E. & C. B. Hellquist. 2000. Aquatic and wetland plants of northeastern North America, 2 vols.
Eilers, L. J. & D. M. Roosa. 1994. The vascular plants of Iowa
Godfrey, R. K. & J. W. Wooten. 1979-1981. Aquatic and wetland plants of southeastern United States, 2 vol.
Kaul, R. B. et al. 2006. The flora of Nebraska.
McGregor, R. L. et al. (The Great Plains Flora Association). 1986. Flora of the Great Plains.
Ohio Flora Committee (E. L. Braun, T. S. Cooperrider, T. R. Fisher, J. J. Furlow). 1967-. The vascular flora of Ohio.
Turner, B. L. et al. 2003. Atlas of the vascular plants of Texas. Sida Botanical Miscellany no. 24
Voss, E. 1972-. Michigan flora.
Wasshausen, D. C. 1998. Acanthaceae of the Southeastern United States. Castanea 63:113-114.
Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
Wetter, M. A. et al. WISFLORA: Wisconsin vascular plant species (on-line resource). Note: excluded from flora
Yatskievych, G. 1999-. Steyermark's Flora of Missouri, revised edition

Common names

Language	Name	Alternate name	note	seq	Citation
English	American water-willow			1	Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
English	water-willow			1	McGregor, R. L. et al. (The Great Plains Flora Association). 1986. Flora of the Great Plains.

Distribution

order_code	Status	Continent	Subcontinent	Country	State	Note	Reference
1	Native	Northern America	Eastern Canada	Canada	Ontario	s.e.	Crow, G. E. & C. B. Hellquist. 2000. Aquatic and wetland plants of northeastern North America, 2 vols.
1	Native	Northern America	Eastern Canada	Canada	Québec	s.w.	Crow, G. E. & C. B. Hellquist. 2000. Aquatic and wetland plants of northeastern North America, 2 vols.
1	Native	Northern America	North-Central U.S.A.	United States	Illinois		Wasshausen, D. C. 1998. Acanthaceae of the Southeastern United States. Castanea 63:113-114.
1	Native	Northern America	North-Central U.S.A.	United States	Iowa	s.e.	Eilers, L. J. & D. M. Roosa. 1994. The vascular plants of Iowa
1	Native	Northern America	North-Central U.S.A.	United States	Kansas	e.	Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	North-Central U.S.A.	United States	Missouri		Yatskievych, G. 1999-. Steyermark's Flora of Missouri, revised edition
1	Native	Northern America	North-Central U.S.A.	United States	Oklahoma		Wasshausen, D. C. 1998. Acanthaceae of the Southeastern United States. Castanea 63:113-114.
1	Native	Northern America	Northeastern U.S.A.	United States	Indiana		Wasshausen, D. C. 1998. Acanthaceae of the Southeastern United States. Castanea 63:113-114.
1	Native	Northern America	Northeastern U.S.A.	United States	Michigan	s.e.	Voss, E. 1972-. Michigan flora.
1	Native	Northern America	Northeastern U.S.A.	United States	New Jersey		Crow, G. E. & C. B. Hellquist. 2000. Aquatic and wetland plants of northeastern North America, 2 vols.
1	Native	Northern America	Northeastern U.S.A.	United States	New York		Crow, G. E. & C. B. Hellquist. 2000. Aquatic and wetland plants of northeastern North America, 2 vols.
1	Native	Northern America	Northeastern U.S.A.	United States	Ohio		Ohio Flora Committee (E. L. Braun, T. S. Cooperrider, T. R. Fisher, J. J. Furlow). 1967-. The vascular flora of Ohio.
1	Native	Northern America	Northeastern U.S.A.	United States	Pennsylvania		Wasshausen, D. C. 1998. Acanthaceae of the Southeastern United States. Castanea 63:113-114.
1	Native	Northern America	Northeastern U.S.A.	United States	Vermont	n.w.	Crow, G. E. & C. B. Hellquist. 2000. Aquatic and wetland plants of northeastern North America, 2 vols.
1	Native	Northern America	Northeastern U.S.A.	United States	West Virginia		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	South-Central U.S.A.	United States	Texas		Turner, B. L. et al. 2003. Atlas of the vascular plants of Texas. Sida Botanical Miscellany no. 24
1	Native	Northern America	Southeastern U.S.A.	United States	Alabama		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	Southeastern U.S.A.	United States	Arkansas		Wasshausen, D. C. 1998. Acanthaceae of the Southeastern United States. Castanea 63:113-114.
1	Native	Northern America	Southeastern U.S.A.	United States	Delaware		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	Southeastern U.S.A.	United States	Florida		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	Southeastern U.S.A.	United States	Georgia		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	Southeastern U.S.A.	United States	Kentucky		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	Southeastern U.S.A.	United States	Louisiana		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	Southeastern U.S.A.	United States	Maryland		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	Southeastern U.S.A.	United States	Mississippi		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	Southeastern U.S.A.	United States	North Carolina		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	Southeastern U.S.A.	United States	South Carolina		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	Southeastern U.S.A.	United States	Tennessee		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
1	Native	Northern America	Southeastern U.S.A.	United States	Virginia		Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
4	Naturalized	Northern America	North-Central U.S.A.	United States	Nebraska	Sarpy Co.	Kaul, R. B. et al. 2006. The flora of Nebraska.

Native
Northern America

EASTERN CANADA: Canada [Québec (s.w.), Ontario (s.e.)]
NORTHEASTERN U.S.A.: United States [Indiana, Michigan (s.e.), New Jersey, New York, Ohio, Pennsylvania, Vermont (n.w.), West Virginia]
NORTH-CENTRAL U.S.A.: United States [Illinois, Iowa (s.e.), Kansas (e.), Missouri, Oklahoma]
SOUTHEASTERN U.S.A.: United States [Alabama, Arkansas, Delaware, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Tennessee, Virginia]
SOUTH-CENTRAL U.S.A.: United States [Texas]

Naturalized
Northern America

NORTH-CENTRAL U.S.A.: United States [Nebraska (Sarpy Co.)]

Reference(s)

Crow, G. E. & C. B. Hellquist. 2000. Aquatic and wetland plants of northeastern North America, 2 vols.
Eilers, L. J. & D. M. Roosa. 1994. The vascular plants of Iowa
Kaul, R. B. et al. 2006. The flora of Nebraska.
Ohio Flora Committee (E. L. Braun, T. S. Cooperrider, T. R. Fisher, J. J. Furlow). 1967-. The vascular flora of Ohio.
Turner, B. L. et al. 2003. Atlas of the vascular plants of Texas. Sida Botanical Miscellany no. 24
Voss, E. 1972-. Michigan flora.
Wasshausen, D. C. 1998. Acanthaceae of the Southeastern United States. Castanea 63:113-114.
Weakley, A. S. 2011. Flora of the southern and middle Atlantic states.
Yatskievych, G. 1999-. Steyermark's Flora of Missouri, revised edition

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=465632. Accessed 17 April 2026.