Search Field Guide
Advanced Search
Montana Field Guide

Montana Field Guides

Slender Bulrush - Schoenoplectus heterochaetus
Other Names:  Scirpus heterochaetus

Species of Concern

Global Rank: G5
State Rank: S1S2
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 8

External Links






State Rank Reason (see State Rank above)
Information on the species is lacking within montana where it is recorded from only two poorly documented sites. However, its apparent rarity in the state warrants a high conservation status rank.
 
General Description
Stems terete, 50–200 cm, filled with spongy air cavities. Leaf blades reduced to scales. Inflorescence usually open with solitary spikelets on tips of spreading to erect peduncles. Spikelets 5–15 mm long. Scales 2.5–4 mm long, lacerate to ciliate, light brown with short, dark red, parallel lines; awn ca. 0.5 mm long. Flowers: bristles 4, ca. as long as achene; stigmas 3. Achene 3-sided, dark brown, 2–3 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Phenology
Fruiting in August.

Diagnostic Characteristics
The more common Scirpus acutus and S. validus are similar but have 2 stigmas and sessile spikelets arranged in small clusters. A land lens will be necessary for positive identification.

Species Range
Present
 


Range Comments
Phillips County. AB to QC south to CA, ID, WY, OK and NY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 2

(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 and edges of lakes and ponds on the plains.

Ecological Systems Associated with this Species

References
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Fassett, N. C. 1985. (3rd ed.) A Manual of Aquatic Plants, with Revision Appendix by E. C. Ogden. University of Wisconsin Press, Madison. 405 pp.
    • Heidel, B.L., S.V. Cooper and C. Jean. 2000. Plant species of special concern and plant associations of Sheridan County, Montana. Report to U.S. Fish and Wildlife Service. Montana Natural Heritage Program, Helena, Montana. 96 p.
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Web Search Engines for Articles on "Slender Bulrush"
  • Additional Sources of Information Related to "Monocots"
Login Logout
Citation for data on this website:
Slender Bulrush — Schoenoplectus heterochaetus.  Montana Field Guide.  .  Retrieved on , from