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Montana Field Guide

Montana Field Guides

Jointed Rush - Juncus articulatus

Native Species

Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 7

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General Description
Rhizomatous. Stems erect, terete, 10–70 cm, often tufted. Leaves basal and cauline; blades terete, 1–2 mm wide; auricles acute to rounded. Inflorescence open with erect to spreading branches and clusters of 3 to 10 flowers; main bract smaller than the inflorescence. Flowers: prophylls absent; tepals green to brown, 2–3 mm long, acute to acuminate, ca. equal; stamens 6. Capsules 3–4 mm long, exserted, acuminate, tapering to the beak; seeds with minute appendages (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
BC to NL south to OR, AZ, NE, KY and VA (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
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
Wet mineral soil of stream or ditch banks, margins of lakes, wetlands; 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:
Jointed Rush — Juncus articulatus.  Montana Field Guide.  .  Retrieved on , from