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Monday, April 28, 2008

Horsetails of Berrien County, Michigan

The horsetails of the Class Equisetopsida are the oldest living members of the plant kingdom, dating back some 300-350 million years to the Carboniferous period. According to the Online Atlas of Michigan Plants, 5 species of horsetails are found in Berrien County, representing a single order, a single family, and a single genus:

ORDER EQUISETALES (Horsetails)
Family Equisetaceae (Horsetails):
  • Equisetum arvense, Field Horsetail
  • Equisetum fluviatile, Water Horesetail
  • Equisetum hyemale, Scouring-rush Horsetail
  • Equisetum palustre, Marsh Horsetail
  • Equisetum variegatum, Variegated Horsetail
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