Horsetail (Equisetum arvense), also known as field horsetail or shavegrass, is a perennial plant that belongs to the Equisetaceae family. It is one of the oldest living plant species, dating back to prehistoric times, and is commonly found in wet or damp environments across the Northern Hemisphere.

This is a flowering herb that belongs to the mint family (Lamiaceae). It is native to Europe but has become widespread in North America and other temperate regions. Horehound has a long history of use in traditional medicine and is particularly known for its potential benefits for respiratory health.

This is a shrub native to the warm, dry regions of the Americas, including Mexico, Central America, and parts of the southwestern United States. It has been used traditionally for its medicinal properties, particularly in herbal medicine.