Horsetail (Hybrid) - Equisetum x ferrissii
MNPS Threat Rank
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).
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:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Moist areas including shorelines, riverbanks, roadsides and prairies (Haute, 1993, in Flora N. Amer., Vol. 2).
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.