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Parietaria officinalis, the pellitory-of-the-wall, also known as lichwort, is a plant of the nettle family. Its leaves, however, are non-stinging. The plant grows on rubbish and on walls, hence the name.
The pollen is a cause of allergy.
It was once used as a medicinal herb and in the making of certain metheglins.
The leaves and flowers of P. officianlis contains the flavonoids kaempferol-3-bioside, the 3-glucosides and 3-rutinosides of quercetin, kaempferol and isorhamnetin, 3-sophorosides of quercetin and kaempferol and 3-neohesperosides of kaempferol and isorhamnetin. They also contains caffeoylmalic and two pyrrole acids.
It is in a different family from Anacyclus pyrethrum, also called pellitory.
- Specific hyposensitization in patients allergic to Parietaria officinalis pollen allergen. Cvitanović S, Zekan L, Capkun V and Marusić M, Journal of Investigational Allergology & Clinical Immunology, 1994, volume 4, issue 6, pages 283-290, PubMed
- Flavonoids of Parietaria officinalis. J. Budzianowki, L. Skrzypczak and D. Walkowiak, J. Nat. Prod., 1985, 48 (2), pages 336–337, doi:10.1021/np50038a033
- Caffeoylmalic and two pyrrole acids from Parietaria officinalis. Jaromir Budzianowski, Phytochemistry, 1990, Volume 29, Issue 10, pages 3299–3301, doi:10.1016/0031-9422(90)80203-S
- "w19 Wall pellitory (officinalis), Allergy information". Phadia AB. 2002. Archived from the original on 2006-05-23. Retrieved 2006-07-08.
- "Parietaria officinalis L. (upright pellitory)". The PLANTS Database. United States Department of Agriculture, Natural Resources Conservation Service. Retrieved 2006-07-08.
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