Day: September 12, 2018

Urtica dioica (Urticaceae) is commonly known as nettle, common nettle, or stinging nettle. The species is an herbaceous perennial with a spreading growth habit. Growing 4-6 feet tall, stinging nettle produces numerous erect and wiry stems that hold up its opposite, roughly textured, serrated leaves.^1-4 It produces small, inconspicuous greenish-brownish flowers that emerge as axillary inflorescences.² The stems and undersides of leaves are covered with hairs called trichomes. When touched, these stinging trichomes inject a chemical cocktail that typically causes localized skin irritation as well as a painful, tingling sting from which the species has derived its most common name, stinging nettle.^1,5

The Urticaceae family contains about 500 known species, distributed mainly in tropical areas.¹ The genus Urtica, whose name comes from the Latin uro (to burn) and urere (to sting), consists of both annual and perennial herbaceous plants known for the burning properties of the…