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Montana Field Guide

Montana Field Guides

Alpine Sedge - Carex glacialis

Species of Concern

Global Rank: G5
State Rank: S3
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value:

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State Rank Reason (see State Rank above)
Carex glacialis occurs throughout Canada, and has recently been discovered in the United States where it occurs at 4 locations in Montana. It grows in limestone fellfield habitats within the alpine. Populations are few, but appear stable. Surveys are needed to explore potential habitat, map its distribution, and determine population sizes.
 
General Description
Caespitose. Stems erect, 2–6 cm. Leaves mainly basal; blades < 1 mm wide. Inflorescence of 2 to 4 overlapping spikes; lower bract inconspicuous. Spikes erect, unisexual; the male terminal, 3–5 mm long; the lower female, short-pedunculate, 3–5 mm long. Perigynia spreading, green to purplish-black, obovoid, glabrous, 2–2.5 mm long with a distinct beak ca. 0.5 mm long, loosely aggregated; stigmas 3. Female scales ovate, purplish-black with a hyaline margin and green midvein, shorter than the perigynia. Achene 3-sided, nearly filling the perigynium (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Circumpolar south to BC, AB and MT. Known from Flathead and Pondera counties (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 4

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

Recency

 

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



Habitat
Calcareous fellfields on cool upper slopes; alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Alpine Sedge — Carex glacialis.  Montana Field Guide.  .  Retrieved on , from