Smooth Scouring-rush - Equisetum laevigatum
(see State Rank Reason below)
MNPS Threat Rank
State Rank Reason (see State Rank above)
Approximately 50 collections at MONTU from mainly western Montana.
Stems monomorphic, hollow, usually unbranched, annual, 20–100 cm × 2-8 mm with 10 to 32 ridges. Sheaths green with a terminal black band, the black teeth quickly deciduous. Strobili 10–20 mm, usually blunt. Stems are lighter green and less leathery than those of Equisetum hyemale (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Throughout much of MT; BC to QC south to CA, TX, and IL (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Moist grasslands, woodlands, vernally inundated depressions, roadsides; plains, valleys to montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
- Additional ReferencesLegend: View Online Publication
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- Hawkins, P.H. 1903. The alpine flora of Montana. M.Sc. Thesis, Bozeman, MT: Montana State University. 24 pp.
- Johnson, T. W. 1982. An analysis of pack and saddle stock grazing areas in the Bob Marshall Wilderness. M.Sc.Thesis. Bozeman, MT: Montana State University. 105 p.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.