Search Field Guide
Advanced Search
Montana Field Guide

Montana Field Guides

Flattened Rush - Juncus compressus

Exotic Species (not native to Montana)

Global Rank: G5
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 1

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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Unknown/Undetermined
 


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

Summary of Observations Submitted for Montana
Number of Observations: 11

(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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
Login Logout
Citation for data on this website:
Flattened Rush — Juncus compressus.  Montana Field Guide.  .  Retrieved on , from