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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Rosales

Familia: Urticaceae
Tribus: Parietarieae
Genus: Parietaria
Species: P. alsinifolia – P. cardiostegia – P. cretica – P. debilis – P. elliptica – P. erronea – P. feliciana – P. filamentosa – P. floridana – P. hespera – P. judaica – P. laxiflora – P. lusitanica – P. macrophylla – P. mauritanica – P. micrantha – P. officinalis – P. pensylvanica – P. praetermissa – P. rechingeri – P. rhodopaea – P. roschanica – P. ruwenzoriensis – P. semispeluncaria – P. umbricola

Parietaria L., Sp. Pl. 2: 1052. 1753; Gen. Pl. ed. 5: 471. 1754.

Linnaeus, C. 1753. Species Plantarum. Tomus II: 1052. Reference page.
Linnaeus, C. 1754. Genera Plantarum, ed. 5: 471. Reference page.
Hassler, M. 2018. Parietaria. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2018. Species 2000 & ITIS Catalogue of Life. Published on the internet. Accessed: 2018 Aug. 2. Reference page.
Tropicos.org 2018. Parietaria. Missouri Botanical Garden. Published on the internet. Accessed: 2018 Aug. 2.

Vernacular names
Deutsch: Glaskräuter
English: Pellitory
eesti: Juudinõges
suomi: Muuriyrtit
magyar: Falgyom
Nederlands: glaskruid
svenska: Väggörter

Parietaria is a genus of flowering plants in the family Urticaceae, native to temperate and tropical regions across the world.[1][2][3][4][5][6]

They are annual or perennial herbaceous plants growing to 20–80 cm tall, with green or pink stems. The leaves are alternate, simple, entire, often with a cluster of small leaves in their axils. Individual flowers are bisexual or unisexual, produced in clusters of three to many together in the leaf axils. Plants have either bisexual flowers or both staminate ("male") and carpellate ("female") flowers. The fruit is a small dry achene.[3][4][5]

As of November 2013, The Plant List accepted only 10 species:[7]

Parietaria cretica L.
Parietaria debilis G.Forst. (syn. Parietaria micrantha Ledeb.)
Parietaria floridana Nutt.
Parietaria judaica L. (syn. Parietaria diffusa Mert. & W.D.J.Koch)
Parietaria lusitanica L.
Parietaria macrophylla B.L. Rob. & Greenm.
Parietaria mauritanica Durieu
Parietaria officinalis L.
Parietaria pensylvanica Muhl. ex Willd.
Parietaria praetermissa B.D. Hinton

Names which The Plant List did not accept but regarded as unresolved as of November 2013 include:[7]

Parietaria australis (Nees) Blume
Parietaria cardiostegia Greuter
Parietaria filamentosa Webb & Berthel.
Parietaria hespera B.D.Hinton
Parietaria laxiflora Engl.
Parietaria ruwenzoriensis Cortesi

Other species have been moved to different genera:[7]

Parietaria alsinifolia Delile = Freirea alsinaefolia (Delile) Gaudich.

Several species can be weeds; the Mediterranean species P. judaica is widely naturalised in the Americas, while the American P. pensylvanica is conversely naturalised in Europe.[1][3]

Flora Europaea: Parietaria
African Flowering Plants Database: Parietaria (enter genus name in search box)
Flora of North America: Parietaria
Flora of China: Parietaria
Flora of Pakistan: Parietaria
Australian Plant Name Index: Parietaria
Search for "Parietaria", The Plant List, retrieved 2013-11-02

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