urtication: an itchy skin eruption characterized by weals with pale interiors and well-defined red margins; usually the result of an allergic response to insect bites or food or drugs
hypersensitivity reaction: an inappropriate and excessive reaction to an allergen (as pollen or dust or animal hair or certain foods); severity ranges from mild allergy to severe systemic reactions leading to anaphylactic shock
chilean rimu: about the hardiest Podocarpaceae species; prostrate spreading shrub similar to mountain rimu; mountains of southern Chile