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Urtica dioica: Nettle - http://www.rain-tree.com/nettles.htm
Description and several photographs of the stinging nettle, with information on its herbal properties, uses in traditional medicine, the chemicals it contains, its biological activities, clinical research and its current uses. |
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Urtica dioica: Stinging Nettle - http://www.ppws.vt.edu/scott/weed_id/urtdi.htm
Photographs of this perennial plant, with its description and identifying characteristics. |
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Urtica urens: Annual Nettle - http://www.plant-identification.co.uk/skye/urticaceae/urtica-urens.htm
A description of this species of disturbed ground with a number of photographs. |
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Urtica diocia: Stinging Nettle - http://www.plant-identification.co.uk/skye/urticaceae/urtica-dioica.htm
A number of photographs of the flowers and leaves of this species, and its identifying features. |
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Urtica rupestris - http://www.dipbot.unict.it/orto/0831-1.html
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