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Montana Field Guide

Montana Field Guides

Rough Horsetail - Equisetum hyemale


Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

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General Description
Stems monomorphic, hollow, leathery, dark green, evergreen, unbranched, 18–100 cm × 4–10 mm with 14 to 40 ridges. Sheaths green becoming gray with a black lower band and black, deciduous teeth. Strobili 5–25 mm long with sharp-pointed tips, maturing in summer (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Northwestern counties in MT; circumboreal, south to most of temperate N. America (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 28

(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 grasslands, meadows, aspen groves, streambanks; plains, valleys to montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Rough Horsetail — Equisetum hyemale.  Montana Field Guide.  .  Retrieved on , from