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
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)
Native range: Central United States and Canada (Ontario) (Flora of North America online).
|Also reported from|
Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Canada (except British Colombia)
U.S. Dept. Agr., Agr. Res. Serv. (2013)
United States (continental except west coast)
United States (other states)
|United States (other states)||
||U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)|