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Montana Field Guide

Montana Field Guides

Slender Sedge - Carex lasiocarpa


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 7

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General Description
Rhizomatous. Stems erect, 30–90 cm, loosely tufted. Leaves: basal bladeless; cauline blades 1–2 mm wide, inrolled. Inflorescence of 3 to 4 well-separated sessile spikes; the lowest bract leaflike, ca. as long as the inflorescence. Spikes unisexual, ascending; the uppermost 1 or 2 male, linear, 2–4 cm long; the lower female, 1–3 cm long, cylindrical. Perigynia ascending, purplish, ovoid, pilose, 3–4 mm; the beak 0.5–1 mm long with spreading teeth; stigmas 3. Female scales lanceolate, short-awned, purple with a pale midstripe, longer or shorter than the perigynia. Achene 3-sided, smaller than the perigynium (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety americana Fernald.

Species Range
Present
 


Range Comments
Circumboreal south to CA, ID, MT, IL and VA (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 175

(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
Saturated, organic soil, often forming near monocultures in fens; valleys to lower subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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