Parietaria

Parietaria is a genus of 20–30 species of flowering plants in the family Urticaceae, native to temperate and tropical regions across the world.

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. The flowers are bisexual, produced in clusters of three to many together in the leaf axils. The fruit is a small dry achene.

Selected species
Parietaria alsinifolia Delile
Parietaria australis (Nees) Blume
Parietaria cardiostegia Greuter
Parietaria cretica L.
Parietaria debilis G.Forst.
Parietaria diffusa Mert. & W.D.J.Koch
Parietaria filamentosa Webb & Berthel.
Parietaria floridana Nutt.
Parietaria hespera B.D.Hinton
Parietaria judaica L.
Parietaria laxiflora Engl.
Parietaria lusitanica L.
Parietaria mauritanica Durieu
Parietaria micrantha Ledeb.
Parietaria officinalis L.
Parietaria pensylvanica Muhlenb. ex Willd.
Parietaria praetermissa B.D.Hinton
Parietaria ruwenzoriensis Cortesi
Sources:

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.

Translation

The word "Parietaria" occurs as such in the following languages: English, Spanish, French, Italian, Polish, Portuguese.

Translation(s) in other languages: German: Glaskräuter, Ligurian: Canigèa.