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Montana Field Guide

Montana Field Guides

Three-square Bulrush - Schoenoplectus americanus
Other Names:  Scirpus americanus


Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 6

External Links






 
General Description
Stems 40–150 cm, 3-sided with concave sides. Leaf blades short, flat or folded, 2–8 mm wide. Inflorescence compact, of 2 to 15 sessile spikelets. Spikelets 6–15 mm long. Scales 3–4 mm long, glabrous, reddish to purplish-brown; awn ca. 0.5 mm long. Flowers: bristles 5 or 6, ca. as long as achene; stigmas 2 or 3. Achene 2- or 3-sided with rounded edges, brown, ca. 3 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Known from Beaverhead and Madison counties. BC to NS south to CA, AZ, NM, TX MS, FL, Mexico and S. America (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 4

(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
Usually saline or alkaline, wet meadows, marshes; valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Three-square Bulrush — Schoenoplectus americanus.  Montana Field Guide.  .  Retrieved on , from