Green-keeled Cottonsedge - Eriophorum viridicarinatum
(see State Rank Reason below)
MNPS Threat Rank
State Rank Reason (see State Rank above)
See rank details.
- Details on Status Ranking and Review
Score1 - Moderate: Generally 10,000-100,000 individuals.
Score0 - Widespread species within Montana (occurs in 5% or more of the state or generally occurring in 6 or more sub-basins.) as well as outside of Montana.
Area of Occupancy
Score0 - High: Occurs in >25 Subwatersheds (6th Code HUC’s).
Score2 - High: Species is restricted to a highly specialized and limited habitat and is typically dependent upon unaltered, high-quality habitat (C Values of 8-10).
ScoreNA - Rank factor not assessed.
CommentTrends are undocumented, though populations are likely stable or experiencing only minor declines.
Score0-1 - Low to Medium.
Score0-1 - Low to Moderate Vulnerability.
Raw Conservation Status Score
3 to 5 total points scored out of a possible 16 (Rarity factors and threats only).
Rhizomatous. Stems 25–60 cm. Leaves: flat; blades 2–5 mm wide. Inflorescence 2 to 10 nodding, pedunculate spikelets; bracts 2 or more, leaf-like, as long as the inflorescence. Spikelets 15–30 mm long in fruit; lowest scale ca. as long as the spikelet. Fertile scales 4–6 mm long, greenish black with a pale midvein that reaches the tip. Bristles whitish. Achene 2–4 mm long, minutely apiculate (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
AK to NL south to BC, ID, CO, IL and PA (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Wet, organic soil of (often calcareous) fens in the valleys and montane zone.
- Additional ReferencesLegend: View Online Publication
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- Lesica, P. 1986. Vegetation and flora of Pine Butte fen, Teton County, Montana. The Great Basin Naturalist 46(1): 22-32.
- Lesica, P. 1994. The distribution of plant community diversity associated with glacial wetlands in the Ovando Valley, Montana. [Unpublished report.] The Nature Conservancy, Montana Field Office, Helena. 26 pp.
- Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Maguire, B. 1939. Distrubution notes concerning plants of Glacier National Park, Montana-II. Rhodora 41:504-508.
- Moseley, R. K., R. J. Bursik, and M. Manusco. 1991. Floristic inventory of wetlands in Fremont and Teton counties, Idaho. Unpublished report on file IDCDC Department of Fish & Game, Boise, ID. 60 pp.