Latin equisetum, of equus, horse and saeta, cerda, needle, ponytail. Only surviving genus of plants with about 20 species of the family of the equisetaceas very abundant in the Carboniferous period. Occur in wetlands and clean water currents. In my country people use horsetail infusion as diuretic and disinfectant. It resembles ferns and also reproduces by spores.
