• WordNet 3.6
    • n Parietaria small genus of stingless herbs
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Century Dictionary and Cyclopedia
    • n parietaria A 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.
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In literature:

Parietaria, explosive stamens of.
"More Letters of Charles Darwin Volume II" by Charles Darwin