Catnip

Catnip, Nepeta

While mostly known for the influence Catnip has on the domesticated cat and other felines, this non-native plant can still be found in the wild although it is considered a weed. A perennial herb that can grown up to 3 ft, there are number of supposed ailments that catnip has been used to treat. From toothaches, to colds, to colic and cramping, this plant has many applications. The mint-like scent that cats love is actually a defense mechanism used to keep insects away. Some compounds found in catnip oil include citronella and geraniol, both known effective mosquito repellents.