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Montana Field Guides

Hardstem Bulrush - Schoenoplectus acutus
Other Names:  Scirpus acutus

Native Species

Global Rank: G5
State Rank: S4S5
C-value: 5


Agency Status
USFWS:
USFS:
BLM:


 

External Links






 
General Description
Stems terete, 50–200 cm, filled with spongy air cavities. Leaf blades reduced to scales. Inflorescence open or congested with small clusters of spikelets on tips of spreading to erect peduncles. Spikelets 5–10 mm long. Scales 3–4.5 mm long, ciliate, sparsely puberulent, gray to tan-hyaline with short, dark red, parallel lines; awn twisted 1–2 mm long. Flowers: bristles ca. 6, ca. as long as achene; stigmas 2 or 3. Achene usually 2-sided, gray to nearly black, 2–3 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range

Year-round
 


Range Comments
Throughout temperate North America (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 166

(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 or saline marshes around ponds, lakes, sloughs; plains, valleys, montane, rarely higher (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Culver, D.R. 1994. Floristic analysis of the Centennial Region, Montana. M.Sc. Thesis. Montana State University, Bozeman. 199 pp.
    • Cutting, K.A. 2010. Nutrient allocation to egg formation of Lesser Scaup. M.Sc. Thesis. Bozeman, Montana: Montana State University. 74 p.
    • Deane, C.E. 2017. Harvest, nasal-markers, and Lesser Scaup vital rates. M.Sc. Thesis. Bozeman, MT: Montana State University. 102 p.
    • Hale, K.M. 2007. Investigations of the West Nile virus transmission cycle at Medicine Lake National Wildlife Refuge, Montana, 2005-2006. M.Sc. Thesis. Bozeman, MT: Montana State University. 74 p.
  • Web Search Engines for Articles on "Hardstem Bulrush"
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Citation for data on this website:
Hardstem Bulrush — Schoenoplectus acutus.  Montana Field Guide.  .  Retrieved on , from