Triglochin palustris - L.
Slender Bog Arrow-grass
Other English Common Names: Marsh Arrow-grass
Other Common Names: marsh arrowgrass
Synonym(s): Triglochin palustre L.
Taxonomic Status: Accepted
Related ITIS Name(s): Triglochin palustre L. (TSN 38989)
French Common Names: troscart des marais
Unique Identifier: ELEMENT_GLOBAL.2.161159
Element Code: PMJCG02040
Informal Taxonomy: Plants, Vascular - Flowering Plants - Other flowering plants
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Monocotyledoneae Najadales Juncaginaceae Triglochin
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Concept Reference
Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Triglochin palustris
Taxonomic Comments: The epithet is spelled 'palustre' in some sources, following a treatment of Triglochin as neuter. According to the Flora of North America (vol. 22, 2000), "Although Linnaeus, in his original publication of the name, treated Triglochin as neuter, botanical tradition in North America and elsewhere has generally assigned feminine gender (International Code of Botanical Nomenclature, Art. 62.1); for this reason and because the Greek word glochin ... is feminine (ICBN, Art. 62.2), the feminine gender is the more correct under the Code..." Kartesz (1994) treated the genus as neuter; Kartesz (1999) uses the feminine, and thus the epithet spelling 'palustris.'
Conservation Status

NatureServe Status

Global Status: G5
Global Status Last Reviewed: 25May2015
Global Status Last Changed: 06Sep1984
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: G5 - Secure
Nation: United States
National Status: NNR
Nation: Canada
National Status: N5 (18Nov2017)

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Alaska (SNR), California (S2), Colorado (SNR), Idaho (SNR), Illinois (S1), Indiana (S2), Iowa (S2), Maine (SNR), Michigan (SNR), Minnesota (S4), Montana (SNR), Nebraska (S1), Nevada (SNR), New Mexico (SNR), New York (S2), North Dakota (SNR), Ohio (S2), Oregon (S2), Pennsylvania (S1), Rhode Island (SH), South Dakota (SNR), Utah (SNR), Vermont (SNR), Washington (S1), Wisconsin (S3), Wyoming (S3)
Canada Alberta (S5), British Columbia (S5), Labrador (S4S5), Manitoba (S4S5), New Brunswick (S4), Newfoundland Island (S4S5), Northwest Territories (S4), Nova Scotia (S4), Nunavut (S4), Ontario (S5), Prince Edward Island (S2), Quebec (S5), Saskatchewan (S4), Yukon Territory (S4)

Other Statuses

NatureServe Global Conservation Status Factors

Other NatureServe Conservation Status Information

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States AK, CA, CO, IA, ID, IL, IN, ME, MI, MN, MT, ND, NE, NM, NV, NY, OH, OR, PA, RI, SD, UT, VT, WA, WI, WY
Canada AB, BC, LB, MB, NB, NF, NS, NT, NU, ON, PE, QC, SK, YT

Range Map
No map available.

U.S. Distribution by County Help
State County Name (FIPS Code)
CA Inyo (06027), Mono (06051), Tulare (06107), Tuolumne (06109)
IA Cerro Gordo (19033), Chickasaw (19037), Clay (19041), Dickinson (19059), Emmet (19063), Osceola (19143), Palo Alto (19147)*
IL Cook (17031), Kane (17089), Kendall (17093)*, Lake (17097), Mchenry (17111), Will (17197)
IN Delaware (18035)*, Henry (18065)*, La Porte (18091), Lagrange (18087), Lake (18089)*, Noble (18113)*, Randolph (18135)*, St. Joseph (18141), Steuben (18151)
MN Becker (27005), Big Stone (27011), Blue Earth (27013)*, Carver (27019), Chippewa (27023), Clay (27027), Clearwater (27029), Cook (27031)*, Cottonwood (27033), Dakota (27037), Fillmore (27045)*, Goodhue (27049), Houston (27055)*, Jackson (27063), Kandiyohi (27067), Koochiching (27071), Le Sueur (27079), Lincoln (27081), Lyon (27083), Mahnomen (27087), Marshall (27089), Murray (27101), Norman (27107), Olmsted (27109), Otter Tail (27111), Pennington (27113), Pipestone (27117), Polk (27119), Pope (27121), Redwood (27127), Roseau (27135), St. Louis (27137), Stearns (27145), Swift (27151), Wabasha (27157)*, Wilkin (27167), Winona (27169)*, Yellow Medicine (27173)
NE Brown (31017), Cherry (31031), Keya Paha (31103), Sheridan (31161), Sioux (31165)
NY Bronx (36005)*, Erie (36029)*, Genesee (36037), Livingston (36051), Madison (36053), Monroe (36055), Niagara (36063)*, Onondaga (36067), Seneca (36099), Wayne (36117)*, Westchester (36119)*
OH Champaign (39021), Clark (39023), Erie (39043), Greene (39057), Logan (39091), Miami (39109), Ottawa (39123), Portage (39133), Ross (39141), Sandusky (39143)*, Stark (39151), Summit (39153)
OR Grant (41023)
PA Erie (42049)*
WA Okanogan (53047), Pend Oreille (53051)*, Stevens (53065)*
WI Bayfield (55007)*, Calumet (55015)*, Door (55029), Fond Du Lac (55039)*, Green Lake (55047), Kenosha (55059), Manitowoc (55071), Marinette (55075), Milwaukee (55079), Oconto (55083), Ozaukee (55089)*, Racine (55101), Sheboygan (55117), Walworth (55127), Washington (55131), Waukesha (55133), Waushara (55137)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
02 Bronx (02030102)+*, Long Island Sound (02030203)+*, Chenango (02050102)+
04 Baptism-Brule (04010101)+*, Beartrap-Nemadji (04010301)+*, Lake Superior (04020300)+*, Manitowoc-Sheboygan (04030101)+, Door-Kewaunee (04030102)+, Oconto (04030104)+, Peshtigo (04030105)+, Menominee (04030108)+, Upper Fox (04030201)+, Little Calumet-Galien (04040001)+*, Pike-Root (04040002)+, Milwaukee (04040003)+, St. Joseph (04050001)+, St. Joseph (04100003)+*, Cedar-Portage (04100010)+, Sandusky (04100011)+, Cuyahoga (04110002)+, Niagara (04120104)+*, Lake Erie (04120200)+*, Lower Genesee (04130003)+, Irondequoit-Ninemile (04140101)+, Seneca (04140201)+, Oneida (04140202)+
05 Tuscarawas (05040001)+, Lower Scioto (05060002)+, Upper Great Miami (05080001)+, Little Miami (05090202)+, Tippecanoe (05120106)+*, Upper White (05120201)+*, Driftwood (05120204)+*
07 Sauk (07010202)+, South Fork Crow (07010205)+, Upper Minnesota (07020001)+, Pomme De Terre (07020002)+, Lac Qui Parle (07020003)+, Hawk-Yellow Medicine (07020004)+, Chippewa (07020005)+, Redwood (07020006)+, Middle Minnesota (07020007)+, Cottonwood (07020008)+, Lower Minnesota (07020012)+, Rush-Vermillion (07040001)+, Buffalo-Whitewater (07040003)+*, Zumbro (07040004)+, La Crosse-Pine (07040006)+*, Root (07040008)+*, Turkey (07060004)+, Upper Wapsipinicon (07080102)+, Winnebago (07080203)+, Upper Rock (07090001)+, Crawfish (07090002)+, Kishwaukee (07090006)+*, Des Moines Headwaters (07100001)+, Upper Des Moines (07100002)+, Kankakee (07120001)+, Chicago (07120003)+*, Des Plaines (07120004)+, Upper Fox (07120006)+, Lower Fox (07120007)+
09 Mustinka (09020102)+, Otter Tail (09020103)+, Upper Red (09020104)+, Buffalo (09020106)+, Elm-Marsh (09020107)+, Eastern Wild Rice (09020108)+, Sandhill-Wilson (09020301)+, Red Lakes (09020302)+, Red Lake (09020303)+, Clearwater (09020305)+, Grand Marais-Red (09020306)+, Snake (09020309)+, Roseau (09020314)+, Vermilion (09030002)+, Little Fork (09030005)+, Big Fork (09030006)+, Lake of the Woods (09030009)+
10 Little White (10140203)+, Niobrara Headwaters (10150002)+, Middle Niobrara (10150004)+, Lower Big Sioux (10170203)+, Rock (10170204)+, Little Sioux (10230003)+
16 West Walker (16050302)+*
17 Pend Oreille (17010216)+*, Kettle (17020002)+, Colville (17020003)+*, Okanogan (17020006)+*, Similkameen (17020007)+*, Upper John Day (17070201)+
18 Upper Kern (18030001)+, Upper Kaweah (18030007)+*, Upper King (18030010)+*, Upper Tuolumne (18040009)+, Crowley Lake (18090102)+, Owens Lake (18090103)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History Not yet assessed
Economic Attributes Not yet assessed
Management Summary Not yet assessed
Population/Occurrence Delineation Not yet assessed
Population/Occurrence Viability
U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

  • Bowles, M.L. 1991. Some aspects of the status and ecology of seven rare wetland plants in the Chicago region of northeastern Illinois. Erigenia 11:52-66.

  • Cody, W.J. 1988. Plants of Riding Mountain National Park, Manitoba. Agriculture Canada, Publication 1818/E, Ottawa ON.

  • Deam, C. C. 1940. Flora of Indiana. Division of Forestry, Dept. of Conservation, Indianapolis, Indiana. 1236 pp.

  • Douglas, G.W., D. Meidinger, and J. Pojar, eds. 2001. Illustrated Flora of British Columbia, Vol. 6, Monocotyledons (Acoraceae through Najadaceae). B.C. Minist. Environ., Lands and Parks, and B.C. Minist. For., Victoria, BC. 361pp.

  • Evers, R.A. and L.M. Page. 1977. Some unusual natural areas in Illinois. Ill. Nat. Hist. Surv Biol. Notes No. 100. 47pp.

  • Flora of North America Editorial Committee. 2000. Flora of North America north of Mexico. Vol. 22. Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in part), and Zingiberidae. Oxford Univ. Press, New York. xxiii + 352 pp.

  • Gates, F.C. 1912. The vegetation of the beach area in northeastern Illinois and southeastern Wisconsin. Bull. Ill. State Lab. Nat. Hist. 9:255-372.

  • Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York. 910 pp.

  • Herbarium, Department of Botany, University of Manitoba, Winnipeg, Manitoba, Canada.

  • Herbarium, Museum of Man and Nature, 190 Rupert Avenue, Winnipeg, Manitoba.

  • Hess, W.J. and N.A. Stoynoff. 1989. Bluff Spring Fen Naure Preserve: checklist of vascular plant taxa. Trans. Ill. State Acad. Sci. 82:121-128.

  • Holmgren, Noel. 1998. The Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Kartesz, J.T. 1996. Species distribution data at state and province level for vascular plant taxa of the United States, Canada, and Greenland (accepted records), from unpublished data files at the North Carolina Botanical Garden, December, 1996.

  • Mitchell, Richard S. and Gordon C. Tucker. 1997. Revised Checklist of New York State Plants. Contributions to a Flora of New York State. Checklist IV. Bulletin No. 490. New York State Museum. Albany, NY. 400 pp.

  • Moran, R.C. 1981. Prairie fens in northeastern Illinois: Floristic composition and disturbance. Pp. 164-168 in Stuckey, R.L. and K.J. Reese, eds., Proc. Sixth North American Prairie Conf. Ohio Biol. Surv. Notes 15. Columbus, Ohio.

  • Nekola, J. C. 1990. Rare Iowa plant notes from the R. V. Drexler Herbarium. Journal of the Iowa Academy of Sciences 97(1):55-73.

  • Scoggan, H.J. 1978. The Flora of Canada. National Museum of Natural Sciences, National Museum of Canada, Publ. in Botany 7(4).

  • Swink, F., and G. Wilhelm. 1994. Plants of the Chicago Region. Morton Arboretum. Lisle, Illinois.

  • Weldy, T. and D. Werier. 2010. New York flora atlas. [S.M. Landry, K.N. Campbell, and L.D. Mabe (original application development), Florida Center for Community Design and Research University of South Florida]. New York Flora Association, Albany, New York

  • Wildlife Management Information System (WMIS). 2006+. Geo-referenced wildlife datasets (1900 to present) from all projects conducted by Environment and Natural Resources, Government of the Northwest Territories, Canada.  Available at

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