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Montana Field Guide

Montana Field Guides

Ferriss' Horsetail - Equisetum x ferrissii

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Native Species

Global Rank: GNA
State Rank: SNA
C-value:


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Plants 20-180 cm; stems unbranched, sheaths dark-girdled with age; teeth 14-32 per sheath, articulate and shed or persistent. Cone apex pointed; spores white and misshapen (Hauke, 1993 in Flora N. Amer., Vol. 2).

Range Comments
Across much of North America, mostly south of Canada and mostly absent from southeastern US (Haute, 1993, in Flora N. Amer., Vol. 2).

Observations in Montana Natural Heritage Program Database
Number of Observations: 6

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Relative Density

Recency

 

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



Habitat
Moist areas including shorelines, riverbanks, roadsides and prairies (Haute, 1993, in Flora N. Amer., Vol. 2).


References
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 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.
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Citation for data on this website:
Ferriss' Horsetail — Equisetum x ferrissii.  Montana Field Guide.  .  Retrieved on , from