View source for Ambrosia psilostachya

{{Treatment/ID
|accepted_name=Ambrosia psilostachya
|accepted_authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
|publications={{Treatment/Publication
|title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|place=5: 526. 1836
|year=1836
}}
|common_names=Herbe à poux vivace
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Ambrosia psilostachya var. californica
|authority=(Rydberg) S. F. Blake
}}{{Treatment/ID/Synonym
|name=Ambrosia psilostachya var. coronopifolia
|authority=(Torrey & A. Gray) Farwell
}}{{Treatment/ID/Synonym
|name=Ambrosia psilostachya var. lindheimeriana
|authority=(Scheele) Blankinship
}}{{Treatment/ID/Synonym
|name=Ambrosia rugelii
|authority=unknown
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Ambrosiinae;Ambrosia;Ambrosia psilostachya
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Ambrosiinae]]</div><div class="higher-taxon"><small>genus</small>[[Ambrosia]]</div><div class="higher-taxon"><small>species</small>[[Ambrosia psilostachya]]</div></div>
|volume=Volume 21
|mention_page=page 12, 15
|treatment_page=page 18
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 10–60(–100+) cm. <b>Stems</b> erect. <b>Leaves</b> proximally opposite, distally alternate; petioles 0–25 mm (often ± winged); blades deltate to lanceolate, 20–60(–140) × 8–35(–50+) mm, pinnately toothed to 1-pinnately lobed, bases cuneate to truncate, ultimate margins entire or toothed, abaxial and adaxial faces hirsutulous to strigose and gland-dotted. <b>Pistillate</b> heads clustered, proximal to staminates; florets 1. <b>Staminate</b> heads: peduncles 0.5–2 mm; involucres obliquely cup-shaped, 2–4(–5) mm diam., hirsutulous; florets 5–15(–30+). <b>Burs</b>: bodies ± obpyramidal to globose, 2–3 mm, hirsutulous, spines or tubercles 0 or 1–6, mostly distal, stoutly conic to acerose, (0.1–)0.5–1 mm, tips straight. <b>2n</b> = 18, 27, 36, 45, 54, 63, 72, 100–104, 108, 144.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Oct(–Dec).
|habitat=Disturbed sites, often wet, alkaline, clay soils
|elevation=0–2200 m
|distribution=Alta.;B.C.;Man.;N.S.;Ont.;P.E.I.;Que.;Sask.;Ala.;Ariz.;Ark.;Calif.;Colo.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;La.;Maine;Mass.;Mich.;Minn.;Miss.;Mo.;Mont.;Nebr.;Nev.;N.H.;N.Mex.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Wash.;Wis.;Wyo.;Mexico (Baja California;Chihuahua;Coahuila).
|discussion=<p>Hybrids between Ambrosia psilostachya and A. artemisiifolia have been called A. ×intergradiens W. H. Wagner. Some botanists consider the type of A. cumanensis Kunth (1818) to be conspecific with that of A. psilostachya.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Ambrosia psilostachya
|author=
|authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
|rank=species
|parent rank=genus
|synonyms=Ambrosia psilostachya var. californica;Ambrosia psilostachya var. coronopifolia;Ambrosia psilostachya var. lindheimeriana;Ambrosia rugelii
|basionyms=
|family=Asteraceae
|phenology=Flowering Jul–Oct(–Dec).
|habitat=Disturbed sites, often wet, alkaline, clay soils
|elevation=0–2200 m
|distribution=Alta.;B.C.;Man.;N.S.;Ont.;P.E.I.;Que.;Sask.;Ala.;Ariz.;Ark.;Calif.;Colo.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;La.;Maine;Mass.;Mich.;Minn.;Miss.;Mo.;Mont.;Nebr.;Nev.;N.H.;N.Mex.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Wash.;Wis.;Wyo.;Mexico (Baja California;Chihuahua;Coahuila).
|reference=None
|publication title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|publication year=1836
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V19-20-21/V21_25.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae
|genus=Ambrosia
|species=Ambrosia psilostachya
}}<!--

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