View source for Arida arizonica

{{Treatment/ID
|accepted_name=Arida arizonica
|accepted_authority=(R. C. Jackson & R. R. Johnson) D. R. Morgan & R. L. Hartman
|publications={{Treatment/Publication
|title=Sida
|place=20: 1413. 2003
|year=2003
}}
|common_names=Desert tansy-aster
|basionyms={{Treatment/ID/Basionym
|name=Machaeranthera arizonica
|authority=R. C. Jackson & R. R. Johnson
|publication_title=Rhodora
|publication_place=69: 476, fig. 1. 1967
}}
|synonyms={{Treatment/ID/Synonym
|name=Machaeranthera ammophila
|authority=Reveal
}} {{Treatment/ID/Synonym
|name=Machaeranthera arida
|authority=B. L. Turner & D. B. Horne
}} {{Treatment/ID/Synonym
|name=Machaeranthera coulteri var. arida
|authority=(B. L. Turner & D. B. Horne) B. L. Turner
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Arida;Arida arizonica
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Astereae]]</div><div class="higher-taxon"><small>genus</small>[[Arida]]</div><div class="higher-taxon"><small>species</small>[[Arida arizonica]]</div></div>
|volume=Volume 20
|mention_page=page 402
|treatment_page=page 403
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> 5–40 cm; taproots slender. <b>Stems</b> usually 1, sometimes 2–6+, erect to ascending, slender, usually much branched from base, divaricately so, densely hispiduloso-glandular, viscid. <b>Leaves</b> basal and cauline; proximal petiolate, distal sessile, often clasping; blades oblanceolate to oblong, reduced distally, 10–50(–70) × 1–25 mm, herbaceous, margins coarsely dentate or pinnatifid, apices of teeth or lobes spiny-tipped, faces glandular-hispidulous. <b>Heads</b> borne singly (terminal),often in loose, leafy, corymbiform arrays. <b>Involucres</b> hemispheric, 4–5 × 6–8 mm (fresh). <b>Phyllaries</b> in 2–3 series, appressed to reflexed distally, lanceolate, 1–5 mm, bases whitish, margins ± entire, apices green or sometimes purplish, acute, faces hispiduloso-glandular. <b>Ray</b> florets 20–35+; laminae lavender to whitish, 5–7 mm, coiling after flowering. <b>Disc</b> florets 25–40+; corollas yellow, 3–6 mm. <b>Cypselae</b> oblanceolate, 1.4–2 mm, smooth, faces sparsely sericeous; pappi: ray 0; disc white, terete, 1.5–3 mm. <b>2n</b> = 10.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Nov.
|habitat=Dry, open sandy flats, edges of playas, gravelly washes, riverbanks
|elevation=70–1000 m
|distribution=Ariz.;Calif.;Nev.;Mexico (Sonora).
|discussion=<p><i>Arida arizonica</i> is a widespread and variable species recognized by its annual habit, deeply lobed or pinnatifid leaves, dense glandularity, relatively small heads with lavender to whitish ray florets, and absence of pappi on the ray florets.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Arida arizonica
|author=
|authority=(R. C. Jackson & R. R. Johnson) D. R. Morgan & R. L. Hartman
|rank=species
|parent rank=genus
|synonyms=Machaeranthera ammophila;Machaeranthera arida;Machaeranthera coulteri var. arida
|basionyms=Machaeranthera arizonica
|family=Asteraceae
|phenology=Flowering Mar–Nov.
|habitat=Dry, open sandy flats, edges of playas, gravelly washes, riverbanks
|elevation=70–1000 m
|distribution=Ariz.;Calif.;Nev.;Mexico (Sonora).
|reference=None
|publication title=Sida
|publication year=2003
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V20_921.xml
|tribe=Asteraceae tribe Astereae
|genus=Arida
|species=Arida arizonica
}}<!--

-->[[Category:Treatment]][[Category:Arida]]