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Montana Field Guide

Montana Field Guides

Ivory Sedge - Carex eburnea

Status Under Review
Native Species

Global Rank: G5
State Rank: S3?
(see State Rank Reason below)
C-value: 6

Agency Status


External Links

State Rank Reason (see State Rank above)
This plant has been documented as locally common at a variety of wooded habitats in Dawson, Fergus, Flathead and Richland Counties; this indicates a relatively broad geographic range and ecological amplitude within the state, suggesting that it may be more widespread than currently documented.
General Description
Rhizomatous. Stems erect, 10–25 cm, tufted. Leaves basal and lower-cauline; blades <0.5 mm wide. Inflorescence of 3 to 5 remote spikes; lower bract bladeless. Spikes ascending or spreading, unisexual; the male terminal, ca. 5 mm long; the lower female, long-pedunculate, 3–5 mm long, few-flowered. Perigynia ascending to spreading, green becoming tan, narrowly obovoid, glabrous, ca. 2 mm long with a beak <0.5 mm long, loosely aggregated; stigmas 3. Female scales ovate, hyaline with a dark midstripe, shorter but as wide as the perigynia. Achene 3-sided, filling the perigynium (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

No information available.

Diagnostic Characteristics
Spikes more than one; perigynia triangular; achene triangular with concave sides; perigynia glabrous, filled by achene, style base strongly bulbous thickened.

Species Range
Montana Range Range Descriptions


Range Comments
AK to NL south to BC, MT, NE, AR and AL(Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 2

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Moist green ash forests on the Great Plains or wet spruce forests of intermountain valleys.

  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Brackley, F.E. & Crow, G.E. 1989. Notes on the Rare Flora of New Hampshire. Rhodora 91:105. A89BRA01PAUS
    • Bright, J. 1925-1930. The Genus Carex in Pennsylvania, Trillia 9:1-33. A25BRI01PAUS
    • Fernald, M. L. 1950. Gray's manual of botany. Eighth edition. A handbook of the flowering plants and ferns of the central and northeastern United States and Adjacent Canada. American Book Co., New York.
    • Fernald, M.L. 1935. Critical plants of the upper Great Lakes region of Ontario and Michigan. Rhodora 37: 284-285.
    • Gleason, H.A. 1952. New Britton & Brown. Illustrated Flora. Lancaster Press Inc. Lancaster, Pa. B52GLE01PAUS
    • Hooker, W.J. 1833. Flora Boreali-Americana. 2 vol. (1829-1840) Henry G. Bohn, No 4, York Street, Covent Garden, London. B33HOO01PAUS.
    • Kunsman, J.R. 1989. Noteworthy Recent Collections from Blair County, Pennsylvania. Bartonia 55:23-24. A89KUN01PAUS
    • Kunsman, J.R. and Keener, C.S. 1986. New Records of Vascular Plants from Bair County, Pennsylvania. Bartonia 52:14-25. A86KUN01PAUS
    • Lackschewitz, K., P. Lesica, and J. S. Shelly. 1988. Noteworthy collections: Montana. Madrono 35:355-358.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
    • Mackenzie, K.K. 1935. Cyperacea. North American Flora. A35MAC01PAUS.
    • Mackenzie, K.K. 1940. North American Cariceae; in Rickett, H. W. (ed.) ???. The New York Botanical Garden. New York, NY. Lancaster Press, Lancaster, PA. pp. B40MAC01PAUS.
    • Voss, E.G. 1972. Michigan Flora Part I. Kingsport Press, Bloomfield Hills, Mich. B72VOS01PAUS
  • Web Search Engines for Articles on "Ivory Sedge"
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Citation for data on this website:
Ivory Sedge — Carex eburnea.  Montana Field Guide.  .  Retrieved on , from