Taxon: Najas guadalupensis (Spreng.) Magnus

Summary

Genus:

Najas

Family:

Hydrocharitaceae

Subfamily:

Hydrilloideae

Nomen number:

400100

Place of publication:

Beitr. Kenntn. Najas viii. 1870 (H. G. A. Engler & K. A. E. Prantl, Nat. Pflanzenfam. 2(1):217. 1889)

Verified:

09/26/1994 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

No images

Conservation Status

Reference(s)

Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Davidse, G. et al., eds. 1994. Flora mesoamericana.
FNA Editorial Committee. 1993-. Flora of North America.
Howard, R. 1974-1989. Flora of the lesser Antilles.
Kahn, F. et al. 1993. Las plantas vasculares en las aguas continentales del Peru IFEA, Lima, Peru.
Kartesz, J. T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. Note: with four varieties
NatureServe. 2009-. NatureServe Explorer: an online encyclopedia of life (on-line resource)
Wofford, B. E. Database of Tennessee vascular plants (on-line resource).
Zuloaga, F. O. & O. Morrone, eds. 1996, 1999. Catálogo de las plantas vasculares de la República Argentina. I. Pteridophyta, Gymnospermae y Angiospermae (Monocotyledonae), II. Dicotyledonae. Monogr. Syst. Bot. Missouri Bot. Gard. 60, 74.

Common names

Language	Name	Alternate name	note	seq	Citation
English	southern naiad			1	NatureServe. 2009-. NatureServe Explorer: an online encyclopedia of life (on-line resource)
Swedish	trådnajas			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	Ontario	s.	FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Eastern Canada	Canada	Québec	s.	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		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		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		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	Northwestern U.S.A.	United States	Colorado		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northwestern U.S.A.	United States	Montana		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northwestern U.S.A.	United States	Oregon		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Northwestern U.S.A.	United States	Washington		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	South-Central U.S.A.	United States	Texas		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	District of Columbia		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southeastern U.S.A.	United States	Florida		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	Southern Mexico	Mexico	Chiapas		Davidse, G. et al., eds. 1994. Flora mesoamericana.
1	Native	Northern America	Southern Mexico	Mexico	Yucatán		Davidse, G. et al., eds. 1994. Flora mesoamericana.
1	Native	Northern America	Southwestern U.S.A.	United States	Arizona		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southwestern U.S.A.	United States	California		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southwestern U.S.A.	United States	Nevada		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Southwestern U.S.A.	United States	Utah		FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Western Canada	Canada	Alberta	s.	FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Northern America	Western Canada	Canada	Manitoba	s.	FNA Editorial Committee. 1993-. Flora of North America.
1	Native	Southern America	Brazil	Brazil
1	Native	Southern America	Caribbean	Antigua and Barbuda			Howard, R. 1974-1989. Flora of the lesser Antilles.
1	Native	Southern America	Caribbean	Guadeloupe			Howard, R. 1974-1989. Flora of the lesser Antilles.
1	Native	Southern America	Central America	Costa Rica			Davidse, G. et al., eds. 1994. Flora mesoamericana.
1	Native	Southern America	Central America	El Salvador
1	Native	Southern America	Central America	Honduras			Davidse, G. et al., eds. 1994. Flora mesoamericana.
1	Native	Southern America	Central America	Nicaragua			Davidse, G. et al., eds. 1994. Flora mesoamericana.
1	Native	Southern America	Southern South America	Argentina		n.	Zuloaga, F. O. & O. Morrone, eds. 1996, 1999. Catálogo de las plantas vasculares de la República Argentina. I. Pteridophyta, Gymnospermae y Angiospermae (Monocotyledonae), II. Dicotyledonae. Monogr. Syst. Bot. Missouri Bot. Gard. 60, 74.
1	Native	Southern America	Southern South America	Uruguay			Zuloaga, F. O. & O. Morrone, eds. 1996, 1999. Catálogo de las plantas vasculares de la República Argentina. I. Pteridophyta, Gymnospermae y Angiospermae (Monocotyledonae), II. Dicotyledonae. Monogr. Syst. Bot. Missouri Bot. Gard. 60, 74.
1	Native	Southern America	Western South America	Bolivia
1	Native	Southern America	Western South America	Ecuador
1	Native	Southern America	Western South America	Peru

Native
Northern America

EASTERN CANADA: Canada [Québec (s.), Ontario (s.)]
WESTERN CANADA: Canada [Alberta (s.), Manitoba (s.)]
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, Minnesota, Missouri, Nebraska, Oklahoma, South Dakota, Wisconsin]
NORTHWESTERN U.S.A.: United States [Colorado, Montana, Oregon, Washington]
SOUTHEASTERN U.S.A.: United States [Alabama, Arkansas, Delaware, District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Tennessee, Virginia]
SOUTH-CENTRAL U.S.A.: United States [Texas]
SOUTHWESTERN U.S.A.: United States [Arizona, California, Nevada, Utah]
SOUTHERN MEXICO: Mexico [Chiapas, Yucatán]

Southern America

CARIBBEAN: Antigua and Barbuda, Guadeloupe
CENTRAL AMERICA: Costa Rica, Honduras, Nicaragua, El Salvador
BRAZIL: Brazil
WESTERN SOUTH AMERICA: Bolivia, Ecuador, Peru
SOUTHERN SOUTH AMERICA: Argentina (n.), Uruguay

Reference(s)

Davidse, G. et al., eds. 1994. Flora mesoamericana.
FNA Editorial Committee. 1993-. Flora of North America.
Howard, R. 1974-1989. Flora of the lesser Antilles.
Zuloaga, F. O. & O. Morrone, eds. 1996, 1999. Catálogo de las plantas vasculares de la República Argentina. I. Pteridophyta, Gymnospermae y Angiospermae (Monocotyledonae), II. Dicotyledonae. Monogr. Syst. Bot. Missouri Bot. Gard. 60, 74.

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://npgsweb.ars-grin.gov/gringlobal/taxon/taxonomydetail?id=400100. Accessed 15 October 2026.