View source for Ambrosia tomentosa

{{Treatment/ID
|accepted_name=Ambrosia tomentosa
|accepted_authority=Nuttall
|publications={{Treatment/Publication
|title=Gen. N. Amer. Pl.
|place=2: 186. 1818
|year=1818
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Franseria discolor
|authority=Nuttall
|rank=species
}} {{Treatment/ID/Synonym
|name=Franseria tomentosa
|authority=(Nuttall) A. Nelson
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Ambrosiinae;Ambrosia;Ambrosia tomentosa
|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 tomentosa]]</div></div>
|volume=Volume 21
|mention_page=page 11
|treatment_page=page 17
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 10–30+ cm. <b>Stems</b> erect. <b>Leaves</b> mostly alternate; petioles 8–25(–35+) mm; blades elliptic to lance-elliptic, 50–80(–180+) × 12–20(–50+) mm overall, (1–)2(–3)-pinnately lobed (lobes ± deltate), bases cuneate, ultimate margins with ± deltate teeth, abaxial faces densely finely scabrellous (silvery gray), adaxial faces strigillose. <b>Pistillate</b> heads clustered, proximal to staminates; florets (1–)2. <b>Staminate</b> heads: peduncles 2–9 mm; involucres saucer-shaped (with black nerves), 3–6+ mm diam., strigillose; florets 25–40+. <b>Burs</b>: bodies ± pyriform, somewhat flattened, 1.5–2.5(–4) mm, finely scabrellous, spines (1–)8–12+, scattered, stoutly conic, 0.5–1+ mm, tips straight.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Sep.
|habitat=Seasonally wet clays or sands, disturbed sites
|elevation=(200–)1200–2100 m
|distribution=Ariz.;Colo.;Idaho;Ill.;Iowa;Kans.;Mo.;Mont.;Nebr.;N.Mex.;N.Dak.;S.Dak.;Tex.;Utah;Wis.;Wyo.
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Ambrosia tomentosa
|authority=Nuttall
|rank=species
|parent rank=genus
|synonyms=Franseria discolor;Franseria tomentosa
|basionyms=
|family=Asteraceae
|phenology=Flowering Jun–Sep.
|habitat=Seasonally wet clays or sands, disturbed sites
|elevation=(200–)1200–2100 m
|distribution=Ariz.;Colo.;Idaho;Ill.;Iowa;Kans.;Mo.;Mont.;Nebr.;N.Mex.;N.Dak.;S.Dak.;Tex.;Utah;Wis.;Wyo.
|reference=None
|publication title=Gen. N. Amer. Pl.
|publication year=1818
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V21_19.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae
|genus=Ambrosia
|species=Ambrosia tomentosa
}}<!--

-->[[Category:Treatment]][[Category:Ambrosia]]