Parietaria

(pa-ri-e-ta're-ah.) (Bot.) Agen. of plants, 0. Urticacese. P. Pennsylvanica, the common Pellitory or Hammer-wort, is a rough, pubescent annual herb, found in damp places in the Eastern, Middle, and Northwestern States. P. officinal is, the Wall Pellitory, is by many regarded as a valuable diuretic and lithontriptic. [s. 685]