Three-stamened Rush - Juncus ensifolius
[including] Juncus tracyi, [including] Juncus saximontanus
MNPS Threat Rank
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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
AK to QC south to CA, AZ, NM, TX and Mexico (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Moist to wet soil around seeps, ponds, lakes, along streams, ditches, plains, valleys to subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?
- 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. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 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.