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Montana Field Guide

Montana Field Guides

Carex diluta - Carex diluta

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 1

External Links

General Description
Short-rhizomatous. Stems erect, 15–50 cm, tufted. Leaves mainly basal, yellowish; blades 2–5 mm wide. Inflorescence of 3 to 5 well-separated, pedunculate spikes; the lowest bract greater than the inflorescence. Spikes: 1–2 cm long; the uppermost male, erect, 8–25 mm long; the lower female, ascending to spreading, cylindric. Perigynia ascending to spreading, yellowish, narrowly obovoid, glabrous, veiny, 2.5–3.5 mm long; beak 0.4–0.7 mm long. Female scales ovate, acute, scarious-margined, shorter than the perigynia. Achene 3-sided, smaller than the perigynium (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
Introduced to Madison County; native to Europe (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 3

(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)


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Citation for data on this website:
Carex diluta — Carex diluta.  Montana Field Guide.  .  Retrieved on , from