''Parietaria'' is a genus of
flowering plants in the family
Urticaceae, native to temperate and tropical regions across the world.
[Flora Europaea]
''Parietaria''
/ref>[African Flowering Plants Database]
''Parietaria'' (enter genus name in search box)
/ref>[Flora of North America]
''Parietaria''
/ref>[Flora of China]
''Parietaria''
/ref>[Flora of Pakistan]
''Parietaria''
/ref>[Australian Plant Name Index]
''Parietaria''
/ref>
They are annual or perennial herbaceous plants growing to 20–80 cm tall, with green or pink stems. The leaves
A leaf (plural, : leaves) is any of the principal appendages of a vascular plant plant stem, stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", wh ...
are alternate, simple, entire, often with a cluster of small leaves in their axils. Individual flowers are bisexual
Bisexuality is a romantic or sexual attraction or behavior toward both males and females, or to more than one gender. It may also be defined to include romantic or sexual attraction to people regardless of their sex or gender identity, whi ...
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
An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) and indehiscent (they do not ope ...
.[
]
Species
, The Plant List
The Plant List was a list of botanical names of species of plants created by the Royal Botanic Gardens, Kew and the Missouri Botanical Garden and launched in 2010. It was intended to be a comprehensive record of all known names of plant species ...
accepted only 10 species:[Search for "Parietaria", ]
*''Parietaria cretica
''Parietaria cretica'' is a species of plant in the family Urticaceae
The Urticaceae are a family, the nettle family, of flowering plants. The family name comes from the genus ''Urtica''. The Urticaceae include a number of well-known and use ...
'' L.
*'' Parietaria debilis'' G.Forst. (syn. ''Parietaria micrantha'' Ledeb.)
*''Parietaria floridana
''Parietaria floridana'', common name Florida pellitory, is a plant species native to the southeastern United States, the West Indies, and much of Latin America. In the US, the heart of its range extends from Florida, to Georgia and North and So ...
'' Nutt.
*''Parietaria judaica
''Parietaria judaica'', with common names spreading pellitory or pellitory of the wall, is a species of herbaceous perennial plant in the family Urticaceae. The plant's pollen is highly allergenic. In Australia it is also known as asthma weed, du ...
'' L. (syn. ''Parietaria diffusa'' Mert. & W.D.J.Koch)
*''Parietaria lusitanica
''Parietaria lusitanica'' is a species of plant in the family Urticaceae
The Urticaceae are a family, the nettle family, of flowering plants. The family name comes from the genus ''Urtica''. The Urticaceae include a number of well-known and ...
'' L.
*''Parietaria macrophylla
''Parietaria'' is a genus of flowering plants in the family Urticaceae, native to temperate and tropical regions across the world.Flora Europaea''Parietaria''/ref>African Flowering Plants Database''Parietaria'' (enter genus name in search box)/ref ...
'' B.L. Rob. & Greenm.
*''Parietaria mauritanica
''Parietaria'' is a genus of flowering plants in the family Urticaceae, native to temperate and tropical regions across the world.Flora Europaea''Parietaria''/ref>African Flowering Plants Database''Parietaria'' (enter genus name in search box)/ref ...
'' Durieu
*''Parietaria officinalis
''Parietaria officinalis'', the eastern pellitory-of-the-wall, also known as upright pellitory and 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 pol ...
'' L.
*''Parietaria pensylvanica
''Parietaria pensylvanica'', commonly called Pennsylvania pellitory, is a species of flowering plant in the nettle family. It is native to much of North America including every province in Canada except the Maritimes and Newfoundland and Labrador ...
'' Muhl. ex Willd.
*''Parietaria praetermissa
''Parietaria praetermissa'', the clustered pellitory, is a plant species native to the coastal plains of the southeastern United States, i.e., Georgia, Florida, Louisiana, North Carolina and South Carolina. It grows in hammocks, waste places, cal ...
'' B.D. Hinton
Names which The Plant List did not accept but regarded as unresolved include:[
*''Parietaria australis'' (Nees) Blume
*''Parietaria cardiostegia'' Greuter
*''Parietaria filamentosa'' Webb & Berthel.
*'']Parietaria hespera
''Parietaria hespera'' is a species of flowering plant in the Urticaceae, nettle family known by the common name rillita pellitory. It is native to the southwestern United States and northwestern Mexico, where it grows in many types of habitat, fr ...
'' B.D.Hinton
*''Parietaria laxiflora'' Engl.
*''Parietaria ruwenzoriensis'' Cortesi
Other species have been moved to different genera:[
*''Parietaria alsinifolia'' Delile = '']Freirea alsinaefolia
''Parietaria'' is a genus of flowering plants in the family Urticaceae, native to temperate and tropical regions across the world.Flora Europaea''Parietaria''/ref>African Flowering Plants Database''Parietaria'' (enter genus name in search box)/ref ...
'' (Delile) Gaudich.
Several species can be weeds; the Mediterranean species ''P. judaica'' is widely naturalised
Naturalization (or naturalisation) is the legal act or process by which a non-citizen of a country may acquire citizenship or nationality of that country. It may be done automatically by a statute, i.e., without any effort on the part of the i ...
in the Americas, while the American ''P. pensylvanica'' is conversely naturalised in Europe.[
]
References
{{taxonbar , from=Q163536
Urticaceae genera
Taxa named by Carl Linnaeus