Pacific Island Ecosystems at Risk (PIER)

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Carex muskingumensis
Schwein., Cyperaceae
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Present on Pacific Islands?  no

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 8 (Go to the risk assessment)

Common name(s): [more details]

English: Muskingum sedge, palm sedge

Habit:  sedge

Description:  "Plants densely cespitose. Culms 40-100 cm; vegetative culms conspicuous, with spreading leaf blades evenly along stem. Leaves: sheaths adaxially green-veined to within 3 mm of collar, adaxially firm, summits usually brown tinged, U- or V-shaped, thick; distal ligules to 2 mm; blades 7-12 per fertile culm, 12-25 cm x 3-5 mm. Inflorescences open at least proximally, brown, (4-)5-9 cm x 10-20 mm; proximal internode (4-)5-15 mm; 2d internode (3-)5-11 mm; proximal bracts scalelike. Spikes 5-12, distant, distinct, lanceoloid, 12-28 x 3.5-7 mm, bases tapered, apex acute. Pistillate scales white-hyaline or pale brown with pale brown midstripe, oblong-ovate, 4-5 mm, 1/2 length of and narrower than perigynia, apex acute. Perigynia appressed-erect, pale brown, conspicuously 5-7-veined abaxially, conspicuously 3-7-veined adaxially, lanceolate, flat to plano-convex, 6-9 x (1.5-) 2-2.5 mm, 0.3 mm thick, margin flat, including wing 0.2-0.4 mm wide; beak tip flat, ciliate-serrulate, abaxial suture inconspicuous, distance from beak tip to achene 3.1-4.5 mm. Achenes elongate-oblong, 2-2.7 x 0.8-0.9 mm, 0.3 mm thick"  (Flora of North America online).

Habitat/ecology:  (no habitat/ecology info known by PIER)

Propagation:  Seed

Native range:  Central United States and Canada (Ontario)  (Flora of North America online).


Also reported from
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Canada native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
United States (continental except west coast)
United States (other states)
United States (other states) native
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)

Control:  If you know of control methods for Carex muskingumensis, please let us know.

Need more info? Have questions? Comments? Information to contribute? Contact PIER! (

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This page was created on 26 NOV 2008 and was last updated on 8 AUG 2009.