View source for Parthenium confertum

{{Treatment/ID
|accepted_name=Parthenium confertum
|accepted_authority=A. Gray
|publications={{Treatment/Publication
|title=Proc. Amer. Acad. Arts
|place=17: 216. 1882
|year=1882
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Parthenium confertum var. divaricatum
|authority=Rollins
}} {{Treatment/ID/Synonym
|name=Parthenium confertum var. lyratum
|authority=(A. Gray) Rollins
}} {{Treatment/ID/Synonym
|name=Parthenium confertum var. microcephalum
|authority=Rollins
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Ambrosiinae;Parthenium;Parthenium confertum
|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>[[Parthenium]]</div><div class="higher-taxon"><small>species</small>[[Parthenium confertum]]</div></div>
|volume=Volume 21
|mention_page=page 21
|treatment_page=page 22
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Biennials </b>(sometimes flowering first year or persisting), 10–30(–60+) cm. <b>Leaf</b> blades ovate or rounded-deltate to elliptic, 30–80(–120+) × 10–20(–40+) mm, usually ± pinnately or sub-bipinnately lobed, ultimate margins entire, faces strigillose, usually also with erect hairs 1–2 mm and gland-dotted. <b>Heads</b> disciform or obscurely radiate, borne in open, ± paniculiform arrays. <b>Peduncles</b> 2–8(–12+) mm. <b>Phyllaries</b>: outer 5 lance-ovate to elliptic, 2.5–3+ mm, inner 5 ± orbiculate, 3–3.5 mm. <b>Pistillate</b> florets 5; corolla laminae 0 or ± coroniform, 0.1–0.5 mm. <b>Disc</b> florets 20–30+. <b>Cypselae</b> ± obovoid, 2–3 mm; pappus-like enations 2, ± erect, deltate to ovate, 0.5–1 mm (sometimes a third, subulate spur near apex adaxially). <b>2n</b> = 36, 68, 72.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Oct.
|habitat=Sandy plains, openings in mesquite grasslands
|elevation=20–2000 m
|distribution=Ariz.;N.Mex.;Tex.;Mexico.
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Parthenium confertum
|author=
|authority=A. Gray
|rank=species
|parent rank=genus
|synonyms=Parthenium confertum var. divaricatum;Parthenium confertum var. lyratum;Parthenium confertum var. microcephalum
|basionyms=
|family=Asteraceae
|phenology=Flowering Mar–Oct.
|habitat=Sandy plains, openings in mesquite grasslands
|elevation=20–2000 m
|distribution=Ariz.;N.Mex.;Tex.;Mexico.
|reference=None
|publication title=Proc. Amer. Acad. Arts
|publication year=1882
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V21_35.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae
|genus=Parthenium
|species=Parthenium confertum
}}<!--

-->[[Category:Treatment]][[Category:Parthenium]]