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Montana Field Guide

Montana Field Guides

White-scaled Sedge - Carex xerantica

Status Under Review
Undetermined Origin

Global Rank: G5
State Rank: SU
(see State Rank Reason below)

Agency Status
MNPS Threat Rank:

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 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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).


  • 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.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
White-scaled Sedge — Carex xerantica.  Montana Field Guide.  .  Retrieved on , from