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Montana Field Guide

Montana Field Guides

Pale Bulrush - Scirpus pallidus
Other Names:  Scirpus atrovirens var. pallidus

Status Under Review

Global Rank: G5
State Rank: S3?

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

External Links






 
General Description
Short-rhizomatous. Stems 50–150 cm. Leaves: blades 6–15 mm wide; basal sheaths white to green. Inflorescence unequally umbellate, of several to numerous, pedunculate, capitate clusters. Spikelets 3–5 mm long. Scales 2–2.5 mm long, blackish with a pale midvein and an awn ca. 0.5 mm long. Flowers: bristles 6, straight or curved, spinulose, ca. as long as the scales; stigmas 3. Achene 2- or 3-sided, whitish, ca. 1 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Phenology
Fruiting in late July and August.

Species Range
Present
 


Range Comments
BC to ON south to OR, AZ, NM, TX and MO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 1

(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
Fresh-water or alkaline marshes, streambanks; 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:
Pale Bulrush — Scirpus pallidus.  Montana Field Guide.  .  Retrieved on , from