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Montana Field Guide

Montana Field Guides

White-scaled Sedge - Carex xerantica

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Status Under Review
Undetermined Origin

Global Rank: G5
State Rank: SU
(see State Rank Reason below)
C-value:


Agency Status
USFWS:
USFS:
BLM:


 

External Links

State Rank Reason (see State Rank above)
Most, if not all, reports of this species for Montana are referrable to Carex tahoensis. It is possible that Carex xerantica does occur in Montana east of the Divide.
 
General Description
Densely caespitose. Stems erect, 15–70 cm. Leaves basal and cauline; blades 1–3 mm wide. Inflorescence of 3–5 sessile spikes, separate below, overlapping above; lowest bract inconspicuous. Spikes 7–14 mm long, all similar; female flowers above, male below. Perigynia erect, tan, ovate, convex, wing-margined, 4–5 × 1.5–2 mm, tapered to a serrulate beak, 1–2 mm long; stigmas 2. Female scales white to silvery with a darker midvein, hiding the perigynia. Achene 2-sided, smaller than the perigynium (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
BC to ON south to WY, NE, MN. Reported for MT (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 11

(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

References
  • Literature Cited AboveLegend:   View Online Publication
    • Britton, N. L. and A. B. Brown. 1913. An Illustrated Flora of the Northern United States, Canada, and the British Possessions. 2nd Edition in 3 Volumes. New York, NY: Charles Scribner's Sons. B13BRI01PAUS.
    • 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?
    • Clark, D. 1991. The effect of fire on Yellowstone ecosystem seed banks. M.Sc. Thesis. Montana State University, Bozeman. 115 pp.
    • Culver, D.R. 1994. Floristic analysis of the Centennial Region, Montana. M.Sc. Thesis. Montana State University, Bozeman. 199 pp.
    • Dale, D. 1973. Effects of trail use under forests in the Madison Range, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 96 pp.
    • 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.
    • Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
    • Wood, M.A. 1981. Small mammal communities after two recent fires in Yellowstone National Park. M.Sc. Thesis. Bozeman, Montana: Montana State University. 58 p.
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Citation for data on this website:
White-scaled Sedge — Carex xerantica.  Montana Field Guide.  .  Retrieved on , from