Horsetail (Equisetum arvense) 
Equisetum (; horsetail) is the only living genus in Equisetaceae, a family of vascular plants that reproduce by spores rather than seeds.
Characteristics
- The oldest remains of modern Equisetum species first appear in the Early Jurassic.
- The genus is near-cosmopolitan.
- In some areas the species are considered weeds or invasive.
Sources: Wikipedia — Equisetum
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