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Montana Field Guide

Montana Field Guides

Thick-head Sedge - Carex pachystachya
Other Names:  Carex preslii [of some authors]


Global Rank: G5
State Rank: S4

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

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General Description
Densely caespitose. Stems erect, 15–70 cm. Leaves: basal blades absent; cauline blades 2–4 mm wide. Inflorescence of 4 to 12 sessile, spikes, aggregated into an ovoid head. Spikes 4–8 mm long, all similar; female flowers above male. Perigynia ascending, green to brown, ovate, convex, wing-margined, 3–4.5 × 1–2 mm, the beak, 1–1.5 mm long, serrulate below, entire above; stigmas 2. Female scales medium brown with a pale midstripe and hyaline margins, nearly as wide but shorter than the perigynia. Achene 2-sided, a little smaller than the perigynium (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
AK to CA, NV, UT and CO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 7

(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
Coniferous forest openings, moist meadows, often along streams, lakes; valleys to subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Thick-head Sedge — Carex pachystachya.  Montana Field Guide.  .  Retrieved on , from