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Montana Field Guide

Montana Field Guides

Flattened Rush - Juncus compressus
Other Names:  Compressed Rush

Image Copyright and Usage Information
Non-native Species

Global Rank: G5
State Rank: SNA
C-value: 1


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Rhizomatous. Stems erect, terete, 10–40 cm, sometimes tufted. Leaves basal and cauline; blades flat or channeled, up to 1 mm wide; auricles rounded. Inflorescence open with 5–60 pedicellate flowers; main bract shorter or longer than the inflorescence. Flowers with prophylls; tepals purplish, 2–2.5 mm long, rounded, hood-like, inner shorter and wider; stamens 6. Capsules 2–3 mm long, exserted, rounded to the beak; seeds without appendages (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range Range Descriptions

Non-native
 


Range Comments
Introduced sparingly to northern U.S. and adjacent Canada, native to Eurasia (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 57

(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
Gravelly or sandy riverbanks, roadside ditches; plains (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Management


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?
    • Eggers, M.J.S. 2005. Riparian vegetation of the Montana Yellowstone and cattle grazing impacts thereon. M.Sc. Thesis. Montana State University, Bozeman, MT. 125 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
  • Web Search Engines for Articles on "Flattened Rush"
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Citation for data on this website:
Flattened Rush — Juncus compressus.  Montana Field Guide.  .  Retrieved on , from