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Montana Field Guide

Montana Field Guides

Thread-leaved Sedge - Carex filifolia


Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

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General Description
Densely caespitose. Stems erect, 4–30 cm with old leaf sheaths at the base. Leaves basal and lower-cauline; blades ca. 0.5 mm wide. Inflorescence a solitary bractless spike. Spike narrow, 1–2 cm long; male flowered portion 5–10 mm long; female flowers below. Perigynia obovoid, 3–4 mm long, brown and white, puberulent with a beak 0.5 mm or less long; stigmas 3. Female scales suborbicular, brown with pale margins, hiding the perigynia. Achene 3-sided, filling the perigynium (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety filifolia.

Species Range
Present
 


Range Comments
AK to MB south to CA, AZ, NM and KS (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 146

(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
Often sandy or gravelly soil of grasslands, sagebrush steppe, pine woodlands; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Thread-leaved Sedge — Carex filifolia.  Montana Field Guide.  .  Retrieved on , from