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Nettle refers to plants with stinging hairs, particularly those of the genus Urtica. It can also refer to plants which resemble Urtica species in appearance but do not have stinging hairs. Plants called "nettle" include:
Urtica dioica, often known as common nettle, burn nettle, stinging nettle (although not all plants of this species sting) or nettle leaf, or just a nettle or stinger, is a herbaceous perennial flowering plant in the family Urticaceae. Originally native to Europe, much of temperate Asia and western North Africa, [2] it is now found worldwide.
Urtica is a genus of flowering plants in the family Urticaceae. Many species have stinging hairs and may be called nettles or stinging nettles (the latter name applying particularly to U. dioica). The generic name Urtica derives from the Latin for 'sting'. Due to the stinging hairs, Urtica are rarely eaten by herbivores, but provide shelter for ...
The Urticaceae / ɜːr t ɪ ˈ k eɪ s iː / are a family, the nettle family, of flowering plants.The family name comes from the genus Urtica.The Urticaceae include a number of well-known and useful plants, including nettles in the genus Urtica, ramie (Boehmeria nivea), māmaki (Pipturus albidus), and ajlai (Debregeasia saeneb).
Algebraic number: Any number that is the root of a non-zero polynomial with rational coefficients. Transcendental number: Any real or complex number that is not algebraic. Examples include e and π. Trigonometric number: Any number that is the sine or cosine of a rational multiple of π.
The common names archangel and dead-nettle have been in use for hundreds of years. In 1578 Rembert Dodoens observed that "Dead nettell groweth every where". [46] John Gerard used the word "archangel" in 1633. [47] Gerard believed the dead-nettles were so-named because their leaves resembled those of the true nettles in the family Urticaceae. [48]
Laportea canadensis, commonly called Canada nettle [3] or wood-nettle, is an annual or perennial herbaceous plant of the nettle family Urticaceae, native to eastern and central North America. It is found growing in open woods with moist rich soils and along streams and in drainages.
There are also plants with stinging hairs that are unrelated to the Urticaceae: [11] Cnidoscolus urens, one of a number of species called "bull nettle" or "mala mujer" Boraginaceae: Hydrophylloideae. Phacelia malvifolia (stinging phacelia) [12] Wigandia spp. [13] Euphorbiaceae. Cnidoscolus spp. Cnidoscolus stimulosus (bull nettle or spurge nettle)