Carex chordorrhiza - Ehrh. ex L. f.
Creeping Sedge
Other English Common Names: Cordroot Sedge, Prostrate Sedge, Rope-root Sedge
Other Common Names: creeping sedge
Taxonomic Status: Accepted
Related ITIS Name(s): Carex chordorrhiza Ehrh. ex L. f. (TSN 39547)
French Common Names: carex ŕ longs stolons
Unique Identifier: ELEMENT_GLOBAL.2.154118
Element Code: PMCYP032U0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Sedge Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Monocotyledoneae Cyperales Cyperaceae Carex
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Concept Reference
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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: Carex chordorrhiza
Conservation Status
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NatureServe Status

Global Status: G5
Global Status Last Reviewed: 16May2016
Global Status Last Changed: 24Feb1984
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: G5 - Secure
Reasons: Carex chordorrhiza is cirumboreal, common in Scandinavia, Finland, Russia, and Canada and extending south into the northern United States, where it is infrequent. For example, it is only known from one occurrence in Idaho, and from two counties in Illinois. One threat is competition with invasive vegetation; distribution in in temperate United States and Europe is sporadic, perhaps as a result of drainage.
Nation: United States
National Status: NNR
Nation: Canada
National Status: N5 (01Mar2012)

U.S. & Canada State/Province Status
United States Alaska (SNR), Idaho (S2), Illinois (S1), Indiana (S1), Iowa (S1), Maine (SNR), Massachusetts (S1), Michigan (SNR), Minnesota (SNR), Montana (S3), New Hampshire (S1), New York (S2), North Dakota (S1), Pennsylvania (SX), Vermont (S1), Washington (S1), Wisconsin (SNR)
Canada Alberta (S5), British Columbia (S5), Labrador (S3S5), Manitoba (S5), New Brunswick (S3), Newfoundland Island (S2), Northwest Territories (SNR), Nova Scotia (S1), Nunavut (S4), Ontario (S5), Prince Edward Island (S1), Quebec (S4), Saskatchewan (S5?), Yukon Territory (S5)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Circumboreal; principally of boreal and subarctic regions, commonly found at low and middle altitudes thorughout most of Iceland, Scandinavia, Finland and Russia (Hulten 1986). In North America extending south to the upper Midwest and Pacific Northwest states; in Idaho, occurring only in Bonner County (Idaho Native Plant Society, 1992). In Illinois, occurring in two northeast counties (Herkert, 1991).

Number of Occurrences:  
Number of Occurrences Comments: In Idaho, known from one occurrence (Idaho Native Plant Society, 1992).

Population Size Comments: In Illinois, rare; thought to be extirpated from the state until 1988, when located in Lake County (Herkert, 1991).

Overall Threat Impact Comments: In Illinois, threatened by invasion from glossy buckthorn (Herkert, 1991).

Other NatureServe Conservation Status Information

Distribution
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Global Range: Circumboreal; principally of boreal and subarctic regions, commonly found at low and middle altitudes thorughout most of Iceland, Scandinavia, Finland and Russia (Hulten 1986). In North America extending south to the upper Midwest and Pacific Northwest states; in Idaho, occurring only in Bonner County (Idaho Native Plant Society, 1992). In Illinois, occurring in two northeast counties (Herkert, 1991).

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States AK, IA, ID, IL, IN, MA, ME, MI, MN, MT, ND, NH, NY, PAextirpated, VT, WA, WI
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)
IA Emmet (19063)*, Hancock (19081), Kossuth (19109)*
ID Bonner (16017), Boundary (16021), Kootenai (16055)
IL Lake (17097)
IN Kosciusko (18085)*, La Porte (18091), Whitley (18183)*
MA Berkshire (25003)
MT Flathead (30029), Lincoln (30053), Powell (30077)
ND Bottineau (38009)
NH Coos (33007)
NY Cattaraugus (36009), Jefferson (36045)*, Lewis (36049), Oneida (36065)*, Oswego (36075), Saratoga (36091)*, Seneca (36099)*, Warren (36113), Wyoming (36121)
PA Juniata (42067)*, Tioga (42117)*
VT Addison (50001)*, Bennington (50003), Chittenden (50007)*, Franklin (50011), Orleans (50019)
WA Okanogan (53047)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
01 Upper Androscoggin (01040001)+, Housatonic (01100005)+
02 Hudson-Hoosic (02020003)+, Mohawk (02020004)+*, Pine (02050205)+*, Lower Juniata (02050304)+*
04 Little Calumet-Galien (04040001)+, St. Joseph (04050001)+*, Cattaraugus (04120102)+, Irondequoit-Ninemile (04140101)+, Salmon-Sandy (04140102)+, Seneca (04140201)+*, Oneida (04140202)+, Black (04150101)+*, Chaumont-Perch (04150102)+*, Indian (04150303)+, Winooski River (04150403)+*, Lake Champlain (04150408)+, St. Francois River (04150500)+
05 Eel (05120104)+*, Tippecanoe (05120106)+*
07 Blue Earth (07020009)+*, Winnebago (07080203)+, Upper Des Moines (07100002)+*, East Fork Des Moines (07100003)+*, Upper Fox (07120006)+
09 Lower Souris (09010003)+, Willow (09010004)+
17 Upper Kootenai (17010101)+, Lower Kootenai (17010104)+, Blackfoot (17010203)+, North Fork Flathead (17010206)+, Stillwater (17010210)+, Priest (17010215)+, Upper Spokane (17010305)+, Methow (17020008)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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General Description: Creeping Sedge is a perennial grass-like plant with a single or several stems, 1-3 dm tall, which arise from creeping rhizomes. Old stems become elongate and prostrate. 1-3 leaves, 1-5 cm long, occur at the base of fertile stems. Non-flowering stems have longer leaves. Flowers are borne in 3-8 small, aggregated clusters (spikes) at the stem tips. Each spike has male flowers above and 1-5 female flowers (perigynia) below. The many-nerved perigynia are egg-shaped and 2.5-3.5 mm long. The scales are broadly egg-shaped and the same length as the perigynia that they subtend. There are 2 styles, and the seed (achene) is lens-shaped.
Technical Description: Glabrous, extensively creeping, rhizomatous perennial. The rhizomes are up to 1 m in length, with ascending, non-flowering shoot at each node and a terminal, erect flowering stem. The leaves are narrow (1-2 mm wide), often inrolled, up to 40 cm in length, but much shorter and fewer on the flowering stems. The inflorescence is ovoid, 1 cm long, consisting of 2-5 few-flowered contiguous spikes which are male above female below.
Diagnostic Characteristics: The strict peatland habitat and small heads help distinguish this species. CAREX SIMULATA also occurs in mires but has smaller perigynia with more than 5 per spike. A hand lens and technical manual should be used for positive identification.
Duration: PERENNIAL
Reproduction Comments: Very little is known concerning reproduciton and dispersal.
Ecology Comments: It is a circumpolar, continental plant of boreal and subarctic regions, occuring at low and middle altitudes. It is a constituent of the vegetation of transition mires, i.e. mesotrophic peatlands (poor fen), and characteristically occurs in low sedge vegetation.
Palustrine Habitat(s): Bog/fen
Habitat Comments: Occurs in transiton mires, low-sedge vegetation and sedge dominated 'flarks' (wide, elongated pools) of raised mires.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 18May1998
NatureServe Conservation Status Factors Author: GRIES, D
Element Ecology & Life History Edition Date: 08Oct1994
Element Ecology & Life History Author(s): JM (10/94); KMH (10/92)

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).

References
Help
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  • Fernald, M. L. 1919. Lithological factors limiting the ranges of Pinus banksiana and Thuja occidentalis. Rhodora 21(243): 41-67.

  • Fernald, M.L. 1950. Gray's manual of botany. 8th edition. D. Van Nostrand, New York. 1632 pp.

  • Gleason, Henry A. 1952. The New Britton and Brown Illustrated Flora of the Northeastern United States and Canada.

  • 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.

  • Haag, R. W. 1974. Nutrient limitations to plant production in two tundra communities. Canadian Journal of Botany 52: 103-116.

  • Herkert, J., ed. 1991c. Endangered and threatened species of Illinois: Status and distribution. Volume 1 - Plants. Illinois Endangered Species Protection Board, Springfield. 158 pp.

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  • House, Homer D. 1924. Annotated list of the ferns and flowering plants of New York State. New York State Museum Bulletin 254:1-758.

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  • Page, S.E. and J.O. Rieley. 1985. The ecology and distribution of Carex chordorrhiza L. fil. Watsonia 15:253-259.

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