View source for Parietaria pensylvanica

{{Treatment/ID
|accepted_name=Parietaria pensylvanica
|accepted_authority=Muhlenberg ex Willdenow
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=4(2): 955. 1806
|year=1806
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=W
|label=Weedy
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Parietaria obtusa
|authority=Rydberg ex Small
|rank=species
}} {{Treatment/ID/Synonym
|name=Parietaria occidentalis
|authority=Rydberg
|rank=species
}} {{Treatment/ID/Synonym
|name=Parietaria pensylvanica var. obtusa
|authority=(Rydberg ex Small) Shinners
|rank=variety
}}
|hierarchy=Urticaceae;Parietaria;Parietaria pensylvanica
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Urticaceae]]</div><div class="higher-taxon"><small>genus</small>[[Parietaria]]</div><div class="higher-taxon"><small>species</small>[[Parietaria pensylvanica]]</div></div>
|volume=Volume 3
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> annual, 0.4-6 dm. <b>Stems</b> simple or freely branched, decumbent, ascending, or erect. <b>Leaf</b> blades narrowly to broadly elliptic, lanceolate, oblong, or ovate, (1-)2-9 × 0.4-3 cm, base narrowly cuneate, apex acuminate to long-attenuate or obtuse to rounded; proximal pair of lateral veins arising above junction of blade and petiole. <b>Flowers</b>: involucral bracts 1.8-5 mm, usually less than 2 times length of achene; tepals 1.5-2 mm, shorter than bracts. <b>Achenes</b> light brown, symmetric, 0.9-1.2 × 0.6-0.9 mm, apex obtuse, mucro apical; stipe straight, short-cylindric, centered, basally dilated. <b>2n</b>=14, 16.</span><!--

-->{{Treatment/Body
|phenology=Flowering spring–late fall.
|habitat=Dry ledges, talus slopes, waste and shaded places, primarily in neutral to basic soils, and reported from margins of hot springs in northernmost locations
|elevation=0-2400 m
|distribution=Alta.;B.C.;Man.;Ont.;Que.;Sask.;Yukon;Ala.;Ariz.;Ark.;Calif.;Colo.;Conn.;D.C.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Mont.;Nebr.;Nev.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.;Mexico.
|discussion=<p>Some extremes of <i>Parietaria pensylvanica</i> with short, oblong or ovate leaf blades strongly resemble <i>P. hespera </i>var.<i> hespera</i>. <i>Parietaria hespera</i> is usually more delicate and has thinner leaves with the proximal pair of lateral veins arising at the junction of blade and petiole. Leaf shape and texture tend to overlap in the two species, but in <i>P. pensylvanica</i> the proximal pair of lateral veins clearly arise above the junction of blade and petiole. The extremes of <i>P. pensylvanica</i> frequently are found where the ranges of the two species approach or overlap. Examples of these intermediates are from Gila, Mohave, and Yuma counties, Arizona. A mixed collection from Rock Springs, Gila County, Arizona, suggests that the two species occasionally grow together.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Parietaria pensylvanica
|authority=Muhlenberg ex Willdenow
|rank=species
|parent rank=genus
|synonyms=Parietaria obtusa;Parietaria occidentalis;Parietaria pensylvanica var. obtusa
|basionyms=
|family=Urticaceae
|phenology=Flowering spring–late fall.
|habitat=Dry ledges, talus slopes, waste and shaded places, primarily in neutral to basic soils, and reported from margins of hot springs in northernmost locations
|elevation=0-2400 m
|distribution=Alta.;B.C.;Man.;Ont.;Que.;Sask.;Yukon;Ala.;Ariz.;Ark.;Calif.;Colo.;Conn.;D.C.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Mont.;Nebr.;Nev.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.;Mexico.
|reference=None
|publication title=Sp. Pl.
|publication year=1806
|special status=Illustrated;Weedy
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V3/V3_954.xml
|genus=Parietaria
|species=Parietaria pensylvanica
}}<!--

-->[[Category:Treatment]][[Category:Parietaria]]