View source for Parthenium argentatum

{{Treatment/ID
|accepted_name=Parthenium argentatum
|accepted_authority=A. Gray in W. H. Emory
|publications={{Treatment/Publication
|title=in W. H. Emory, Rep. U.S. Mex. Bound.
|place=2(1): 86. 1859
|year=1859
}}
|common_names=Guayule
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Ambrosiinae;Parthenium;Parthenium argentatum
|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 argentatum]]</div></div>
|volume=Volume 21
|mention_page=page 20
|treatment_page=page 21
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> 30–100+ cm. <b>Leaf</b> blades lanceolate to oblanceolate, 15–25(–40+) × 6–15(–25+) mm, margins mostly entire, some with 1–2(–5) sharp teeth, faces densely strigillose (gray to white) and obscurely or not at all gland-dotted. <b>Heads</b> radiate, in glomerules of 3–5+ at ends of ± ebracteate stalks 8–15(–20+) cm. <b>Peduncles</b> 1–2(–6+) mm. <b>Phyllaries</b>: outer 5 oval-elliptic, 2.5–3+ mm, inner 5 ± orbiculate, 3.5–4 mm. <b>Pistillate</b> florets 5; corolla laminae ovate, 1.2–1.5 mm. <b>Disc</b> florets 20–30+. <b>Cypselae</b> ± obovoid, 2.5–3 mm; pappus-like enations 2(–4), erect to spreading, ± subulate, 0.3–0.8 mm. <b>2n</b> = 36.</span><!--

-->{{Treatment/Body
|phenology=Flowering Apr–Jun.
|habitat=Calcareous soils
|elevation=1000–1500 m
|distribution=Tex.;Mexico.
|discussion=<p>Guayule has sometimes been used for commercial production of natural rubber. Hybrids between <i>Parthenium argentatum</i> and <i>P. incanum</i> have been noted.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Parthenium argentatum
|author=
|authority=A. Gray in W. H. Emory
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering Apr–Jun.
|habitat=Calcareous soils
|elevation=1000–1500 m
|distribution=Tex.;Mexico.
|reference=None
|publication title=in W. H. Emory, Rep. U.S. Mex. Bound.
|publication year=1859
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_33.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae
|genus=Parthenium
|species=Parthenium argentatum
}}<!--

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