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Montana Field Guide

Montana Field Guides

Water Sedge - Carex aquatilis


Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 5

External Links






 
General Description
Rhizomatous. Stems erect, 30–100 cm, often tufted. Leaves basal and cauline; blades 2–6 mm wide. Inflorescence of 3 to 10 well-separated spikes; the lowest bract greater than the inflorescence. Spikes erect; the uppermost 1 to 3 male, the lower female or androgynous, subsessile to pedunculate below, 12–60 mm long, cylindric. Perigynia ascending, green to tan, obovate, veinless, glabrous, 2–3 mm long with a minute beak. Female scales lanceolate, acute, brown with a pale midstripe, equal to or smaller and narrower than the perigynia. Achene 2-sided, smaller than the perigynium (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

We have varieties aquatilis and dives (T. Holm) Kukenth.

Species Range
Present
 


Range Comments
Circumboreal south through temperate N. America (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 75

(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
Marshes, wet meadows, fens, streambanks; plains, valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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