- Stinging Hair of Urtica dioica, with a portion of the epidermis, and, to the right, a small bristle (X60).
- Male Flowerof the Nettle (Urtica).
- Tetramerous monochlamydeous male flower of the Nettle (Urtica).
Then there are Canada hemp, Apocynum cannabinum, Kentucky hemp, Urtica cannabina, and others.
Several homeopathic remedies, including Urtica urens and Apis (Apis mellifica), may help relieve the itch, redness, or swelling associated with hives.