Horsetail (Equisetum arvense or E. arvense) is a perennial herb in the Equisetaceae family of plants. Perennial means a plant returns every year and usually lives at least two years. Considered a ...

If you've ever battled horsetail weeds in your yard, you know just how stubborn these plants can be. Horsetail (genus Equisetum) has been around since prehistoric times, and it sure acts like it!

Horsetails are unusual plants, related to ferns, that grow in clumps and look a bit like green toilet brushes planted upside down. Thin stems sprout from joints along hollow stems. The Equisetum ...