The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

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Tamarix L.

Common name: tamarisk

Taxonomy: available through www.itis.govITIS logo

Native Range:
Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Nonindigenous Occurrences:

Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Tamarix are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†
AZ1894201835Aqua Fria; Brawley Wash; Canyon Diablo; Centennial Wash; Grand Canyon; Grand Wash; Hassayampa; Havasu-Mohave Lakes; Imperial Reservoir; Lake Mead; Little Colorado Headwaters; Lower Colorado; Lower Colorado-Marble Canyon; Lower Gila; Lower Gila-Painted Rock Reservoir; Lower Little Colorado; Lower Salt; Lower San Pedro; Lower Verde; Lower Virgin; Middle Gila; Middle Little Colorado; Moenkopi Wash; Sacramento Wash; San Carlos; San Cristobal Wash; San Francisco; San Simon; Santa Rosa Wash; Upper Gila-Mangas; Upper Gila-San Carlos Reservoir; Upper Little Colorado; Upper San Pedro; Upper Verde; Yuma Desert
CA1941201720Aliso-San Onofre; Antelope-Fremont Valleys; Crowley Lake; Death Valley-Lower Amargosa; Eureka-Saline Valleys; Fish Lake-Soda Spring Valleys; Havasu-Mohave Lakes; Imperial Reservoir; Indian Wells-Searles Valleys; Lower Colorado; Owens Lake; Panamint Valley; Salton Sea; San Diego; San Jacinto; Santa Ana; Santa Clara; South Fork Kern; Southern Mojave; Upper Cache
CO1937201817Arkansas Headwaters; Colorado Headwaters-Plateau; Lower Dolores; Lower Green-Diamond; Lower Gunnison; Lower San Juan-Four Corners; Mancos; McElmo; Montezuma; Saguache; San Luis; San Miguel; Uncompahgre; Upper Arkansas; Upper Arkansas-John Martin Reservoir; Upper Arkansas-Lake Meredith; Upper Dolores
CT192120012Saugatuck; Shetucket
DC188318961Middle Potomac-Anacostia-Occoquan
ID193820154Brownlee Reservoir; Bruneau; C.J. Strike Reservoir; Middle Snake-Succor
KS192920064Middle Arkansas-Lake McKinney; Upper Cimarron; Upper Cimarron-Bluff; Upper Salt Fork Arkansas
MD194119441Middle Potomac-Anacostia-Occoquan
MS192219221Lower Big Black
MT199920156Arrow; Bullwhacker-Dog; Fort Peck Reservoir; Judith; Middle Powder; Upper Missouri-Dearborn
NV1937201827Carson Desert; Death Valley-Lower Amargosa; Dixie Valley; Fish Lake-Soda Spring Valleys; Granite Springs Valley; Havasu-Mohave Lakes; Hot Creek-Railroad Valleys; Ivanpah-Pahrump Valleys; Lake Mead; Las Vegas Wash; Lower Humboldt; Lower Quinn; Lower Virgin; Meadow Valley Wash; Middle Humboldt; Muddy; Northern Big Smoky Valley; Northern Great Salt Lake Desert; Pilot-Thousand Springs; Pine; Piute Wash; Ralston-Stone Cabin Valleys; Reese; Southern Big Smoky Valley; Southern Great Salt Lake Desert; Upper Amargosa; Upper Quinn
NJ191619161Great Egg Harbor
NM1895201722Animas; Animas Valley; Blanco Canyon; Caballo; Chaco; Cimarron; Conchas; El Paso-Las Cruces; Middle San Juan; Rio Felix; Rio Grande-Albuquerque; Rio Grande-Santa Fe; Rio San Jose; Salt Basin; Tularosa Valley; Upper Canadian-Ute Reservoir; Upper Gila-Mangas; Upper Pecos; Upper Pecos-Long Arroyo; Upper Puerco; Upper Rio Grande; Upper San Juan
OK196619705Lower North Canadian; Lower Salt Fork Arkansas; Middle North Canadian; Palo Duro; Upper Washita
OR201420184Alvord Lake; Burnt; Lake Abert; Lower John Day
SD193620174Angostura Reservoir; Lower Belle Fourche; Middle Cheyenne-Spring; South Fork Moreau
TX1877201833Aransas Bay; Big Bend; Black Hills-Fresno; Blue-China; Bosque; Cibolo-Red Light; El Paso-Las Cruces; International Falcon Reservoir; Johnson Draw; Landreth-Monument Draws; Lower Pecos-Red Bluff Reservoir; Lower Prairie Dog Town Fork Red; Lower Salt Fork Red; Middle Brazos-Palo Pinto; Middle Canadian-Spring; Middle North Fork Red; Middle Pease; Mustang Draw; Northern Gulf of Mexico; Palo Duro; Pease; Pecos; Punta de Agua; Rio Grande-Fort Quitman; Salt Basin; Salt Draw; San Ambrosia-Santa Isabel; South Corpus Christi Bay; Toyah; Tunas; Upper San Antonio; West Galveston Bay; Yellow House Draw
UT1940201833Bear Lake; Beaver Bottoms-Upper Beaver; Escalante; Fremont; Hamlin-Snake Valleys; Jordan; Lower Bear-Malad; Lower Dolores; Lower Green; Lower Green-Desolation Canyon; Lower Green-Diamond; Lower Lake Powell; Lower San Juan; Lower San Juan-Four Corners; Lower Virgin; McElmo; Middle Sevier; Muddy; Northern Great Salt Lake Desert; Paria; Price; San Rafael; Sevier Lake; Skull Valley; Southern Great Salt Lake Desert; Tule Valley; Upper Colorado-Kane Springs; Upper Green-Flaming Gorge Reservoir; Upper Lake Powell; Upper Virgin; Utah Lake; Westwater Canyon; Willow
WA198419931Upper Columbia-Priest Rapids
WY1979201817Badwater; Big Horn Lake; Greybull; Little Snake; Little Wind; Lower Wind; Muddy; Muskrat; Nowood; Salt; Shoshone; South Fork Powder; Upper Bighorn; Upper Green-Flaming Gorge Reservoir; Upper North Platte; Upper Powder; Vermilion

Table last updated 1/21/2022

† Populations may not be currently present.

Impact of Introduction:
Summary of species impacts derived from literature review. Click on an icon to find out more...


Tamarix overgrows and replaces native vegetation. Once established, it often creates monocultured stands, changing the landscape (Robinson 1965; Whitmore 1997). Tamarix species are substantial water consumers, known to remove significant amounts of water to from water tables, particularly troublesome in arid areas, such as the American southwest (Carman and Brotherson 1982). It is noted that historically, early in its introduction to the United States, Tamarix species were planted for shading and food for chickens and livestock (Horton 1964).

References: (click for full references)

Carman, J.G., and J.D. Brotherson. 1982. Comparisons of sites infested and not infested with saltcedar (Tamarix pentandra) and Russian olive (Elaeagnus angustifolia). Weed Science 30(4):360-364. https://www.jstor.org/stable/4043625.

Horton, J.S. 1964. Notes on the introduction of deciduous tamarisk (Vol. 16). Rocky Mountain Forest and Range Experiment Station, Forest Service, US Department of Agriculture.

Robinson, T.W. 1965. Introduction, spread and areal extent of saltcedar (Tamarix) in the western states. Geologcal Survey Professional Paper 491-A. US Government Printing Office, Washington, DC.

Whitmore, S. 1997. Aquatic Nuisance Species in Region 6 of the Fish and Wildlife Service. US Fish and Wildlife Service, Great Plains Fish and Wildlife Mgt Assistance Office, Pierre, SD.

Author: C. Morningstar

Revision Date: 11/2/2021

Citation Information:
C. Morningstar, 2022, Tamarix L.: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=3603, Revision Date: 11/2/2021, Access Date: 1/21/2022

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2022]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [1/21/2022].

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