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Montana Field Guide

Montana Field Guides

Thread Rush - Juncus filiformis

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Native Species

Global Rank: G5
State Rank: SNR
C-value: 7


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Spreading-rhizomatous. Stems erect, terete, 4–30 cm. Leaves mainly basal; blades and auricles absent; sheaths green to light brown. Inflorescence congested with 5 to 20 short-pedicellate flowers; main bract terete, erect, appearing like a continuation of and often longer than the stem. Flowers with prophylls; tepals green to tan, 2–4 mm long, acuminate; stamens 6. Capsules 2–3 mm long, rounded on top; seeds unappendaged (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range Range Descriptions

Native
 


Range Comments
Circumboreal south to OR, ID, UT, CO, MI and PA (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 16

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Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat


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?
    • 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.
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Citation for data on this website:
Thread Rush — Juncus filiformis.  Montana Field Guide.  .  Retrieved on , from