Parietaria

**Definition:** A plant genus of the family URTICACEAE which is the most common cause of pollinosis in Mediterranean countries. It is the source of 'allergen Par o I' and of Pollinex used for DESENSITIZATION, IMMUNOLOGIC.

**Tree numbers:** - B01.875.800.575.912.250.859.937.937.777

**Synonyms:** - Pellitory