Mouse-ear; Satinflower; Starweed; Starwort; Stellaria media; White Bird's Eye; White Bird?s Eye; Winterweed 

Urticaria or hives is a relatively common form of allergic reaction that causes raised red skin welts that range upwards from 5 mm (about a 1/4 inch) in diameter, itch severely, and often have a pale border. Urticaria is caused by direct contact with an allergenic substance (generally a plant, such as poison ivy), or an immune response to food or some other allergen. Hives can also be caused by stress.

Water chickweed, S. aquaticumLesser stitchwort, S. gramineaGreater stitchwort, S. holosteaCommon chickweed, S. mediaGreater chickweed, S. neglectaWood stitchwort, S. nemorumMarsh stitchwort, S. palustrisBog stitchwort, S. uliginosa