nparietariaA genus of plants of the apetalous order Urticaceæ and the tribe Urti-ceæ, type of the subtribe Parietarieæ, known by its spreading herbaceous stems, and axillary clusters of three to eight flowers. There are about 8 species, widely scattered through temperate regions. They are low plants, often supporting themselves by hooks which terminate long hairs, and bearing small alternate three-nerved leaves and little bracted flowers. They are known as pellitory or paritory; also hammerwort, and formerly helxine. P. officinalis, the most common species, is the wall-pellitory or lichwort. See pellitory.
Parietaria, explosive stamens of.
"More Letters of Charles Darwin Volume II" by Charles Darwin