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Three-stamened Rush - Juncus ensifolius
Other Names:
[including] Juncus tracyi, [including] Juncus saximontanus
Native Species
Global Rank:
G5
State Rank:
S4
C-value:
4
Agency Status
USFWS:
USFS:
BLM:
External Links
General Description
Rhizomatous. Stems erect, terete, 10–60 cm. Leaves basal and cauline; blades equitant (folded flat in half longitudinally), 1–5 mm wide; auricles absent. Inflorescence of capitate clusters, 3–12 mm across, each with 3 to many sessile flowers; main bract smaller than the inflorescence. Flowers: prophylls absent; tepals tan, black, or purplish, 3–4 mm long, acuminate; stamens 3 or 6. Capsules rounded on top, 3–4 mm long; seeds apiculate or with a short appendage (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Species Range
Montana Range
Range Descriptions
Native
Range Comments
AK to QC south to CA, AZ, NM, TX and Mexico (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations: 396
(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
Moist to wet soil around seeps, ponds, lakes, along streams, ditches, plains, valleys to subalpine (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Stewardship Responsibility
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?
Clark, D. 1991. The effect of fire on Yellowstone ecosystem seed banks. M.Sc. Thesis. Montana State University, Bozeman. 115 pp.- Culver, D.R. 1994. Floristic analysis of the Centennial Region, Montana. M.Sc. Thesis. Montana State University, Bozeman. 199 pp.
- 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.
- Horpestad, A.A. 1969. Factors affecting the distribution and abundance of aquatic macrophytes in parts of the Madison, Firehole and Gibbon Rivers. M.Sc. Thesis. Bozeman, MT: Montana State University. 88 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.
- Sater, S. 2022. The insects of Sevenmile Creek, a pictorial guide to their diversity and ecology. Undergraduate Thesis. Helena, MT: Carroll College. 242 p.
- Williams, K.L. 2012. Classification of the grasslands, shrublands, woodlands, forests and alpine vegetation associations of the Custer National Forest portion of the Beartooth Mountains in southcentral Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 376 p.
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