View source for Grindelia arizonica

{{Treatment/ID
|accepted_name=Grindelia arizonica
|accepted_authority=A. Gray
|publications={{Treatment/Publication
|title=Proc. Amer. Acad. Arts
|place=17: 208. 1882
|year=1882
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Grindelia arizonica var. dentata
|authority=Steyermark
|rank=variety
}} {{Treatment/ID/Synonym
|name=Grindelia arizonica var. microphylla
|authority=Steyermark
|rank=variety
}} {{Treatment/ID/Synonym
|name=Grindelia arizonica var. neomexicana
|authority=(Wooton & Standley) G. L. Nesom
|rank=variety
}} {{Treatment/ID/Synonym
|name=Grindelia arizonica var. stenophylla
|authority=Steyermark
|rank=variety
}} {{Treatment/ID/Synonym
|name=Grindelia laciniata
|authority=
|rank=species
}} {{Treatment/ID/Synonym
|name=Grindelia neomexicana
|authority=
|rank=species
}} {{Treatment/ID/Synonym
|name=Grindelia scabra var. neomexicana
|authority=(Wooton & Standley) Steyermark
|rank=variety
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Grindelia;Grindelia 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>[[Grindelia]]</div><div class="higher-taxon"><small>species</small>[[Grindelia arizonica]]</div></div>
|volume=Volume 20
|mention_page=page 428, 429
|treatment_page=page 435
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole-organism atypical some measurement;whole-organism some measurement;whole-organism duration"><b>Perennials,</b> (10–) 25–70 cm.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem coloration;stem pubescence"><b>Stems </b>erect, stramineous to reddish, glabrous.</span> <span class="statement" id="st-d0_s2" data-properties="cauline blade-leaf shape;cauline blade-leaf shape;cauline blade-leaf shape;cauline blade-leaf atypical distance;cauline blade-leaf distance;cauline blade-leaf l w ratio;base shape;margin architecture or shape;margin shape;margin shape;apex shape;face pubescence;face coloration"><b>Cauline </b>leaf-blades oblong, spatulate, or oblanceolate to linear, 15–45 (–85) mm, lengths mostly 3–8 times widths, bases ± cuneate, margins serrate (teeth from bases to apices or mostly toward apices, apiculate to setose), entire, or (proximal leaves) pinnately lobed to coarsely toothed, apices acute, faces glabrous (or scabridulous near margins), sparsely, or not at all, gland-dotted.</span> <span class="statement" id="st-d0_s3" data-properties="head arrangement;array architecture"><b>Heads </b>usually in corymbiform to paniculiform arrays, rarely borne singly.</span> <span class="statement" id="st-d0_s4" data-properties="involucre shape;involucre shape;involucre length;involucre width"><b>Involucres </b>usually campanulate to obconic, sometimes hemispheric, 4–11 × 8–17 mm.</span> <span class="statement" id="st-d0_s5" data-properties="phyllarie shape;phyllarie fixation or orientation;phyllarie orientation;phyllarie orientation;series quantity;apex orientation;apex course;apex shape;apex coating"><b>Phyllaries </b>in 4–6 series, linear to ± lanceolate, usually appressed, sometimes weakly reflexed or spreading, apices slightly recurved to straight, subulate or acuminate to deltate, slightly to strongly resinous.</span> <span class="statement" id="st-d0_s6" data-properties="ray-floret presence;ray-floret quantity"><b>Ray-</b>florets 0 or 8–26;</span> <span class="statement" id="st-d0_s7" data-properties="lamina atypical some measurement;lamina some measurement">laminae (5–) 7–10 mm.</span> <span class="statement" id="st-d0_s8" data-properties="cypsela coloration;cypsela some measurement;apex shape;apex shape;face coloration or pubescence or relief;face architecture"><b>Cypselae </b>stramineous to brown, 2.5–4 mm, apices coronate or knobby, faces striate to furrowed;</span> <span class="statement" id="st-d0_s9" data-properties="awn quantity;awn course;awn arrangement or shape;awn architecture or pubescence or relief;awn shape;scale shape;scale some measurement">pappi of 2–4 straight or weakly contorted, smooth setiform awns or subulate scales 2–5 mm, shorter than disc corollas.</span> <span class="statement" id="st-d0_s10" data-properties="pappus height or length or size;2n chromosome quantity">2n = 12.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Sep(–Oct).
|habitat=Open, rocky slopes, mesas, ridges, canyons, fields, stream banks
|elevation=(300–)1500–2500 m
|distribution=Ariz.;Colo.;N.Mex.;Tex.;Utah;Mexico (Chihuahua);Mexico (Coahuila)
|discussion=<p>Plants of Grindelia arizonica with ± hemispheric involucres and apices of phyllaries ± subulate (versus lance-acuminate to deltate) have been called var. neomexicana (or G. neomexicana). Plants known as var. stenophylla differ from typical G. arizonica in having leaf margins toothed mostly toward apices (versus toothed from bases to apices). Plants of G. arizonica (from northern Arizona, southwestern Colorado, and southeastern Utah) with leaf margins pinnately lobed to ± laciniate or coarsely dentate have been called G. laciniata. Some herbarium specimens that have been identified as G. aphanactis (see 4. G. squarrosa) appear to be discoid plants of G. arizonica. Hybrids between G. arizonica and G. squarrosa have been recorded from Colorado and Utah.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Grindelia arizonica
|authority=A. Gray
|rank=species
|parent rank=genus
|synonyms=Grindelia arizonica var. dentata;Grindelia arizonica var. microphylla;Grindelia arizonica var. neomexicana;Grindelia arizonica var. stenophylla;Grindelia laciniata;Grindelia neomexicana;Grindelia scabra var. neomexicana
|basionyms=
|family=Asteraceae
|phenology=Flowering Jun–Sep(–Oct).
|habitat=Open, rocky slopes, mesas, ridges, canyons, fields, stream banks
|elevation=(300–)1500–2500 m
|distribution=Ariz.;Colo.;N.Mex.;Tex.;Utah;Mexico (Chihuahua);Mexico (Coahuila)
|reference=None
|publication title=Proc. Amer. Acad. Arts
|publication year=1882
|special status=Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V20_997.xml
|tribe=Asteraceae tribe Astereae
|genus=Grindelia
|species=Grindelia arizonica
|2n chromosome quantity=12
|apex coating=resinous
|apex course=straight
|apex orientation=recurved
|apex shape=knobby;coronate;acuminate;deltate
|array architecture=corymbiform;paniculiform
|awn architecture or pubescence or relief=smooth
|awn arrangement or shape=contorted
|awn course=straight
|awn quantity=2;4
|awn shape=setiform
|base shape=cuneate
|cauline blade-leaf atypical distance=45mm;85mm
|cauline blade-leaf distance=15mm;45mm
|cauline blade-leaf l w ratio=3-8
|cauline blade-leaf shape=oblanceolate;linear
|cypsela coloration=stramineous;brown
|cypsela some measurement=2.5mm;4mm
|face architecture=furrowed
|face coloration=gland-dotted
|face coloration or pubescence or relief=striate
|face pubescence=glabrous
|head arrangement=singly
|involucre length=4mm;11mm
|involucre shape=hemispheric;usually campanulate;obconic
|involucre width=8mm;17mm
|lamina atypical some measurement=5mm;7mm
|lamina some measurement=7mm;10mm
|margin architecture or shape=serrate
|margin shape=pinnately lobed;coarsely toothed
|pappus height or length or size=shorter
|phyllarie fixation or orientation=appressed
|phyllarie orientation=spreading;reflexed
|phyllarie shape=linear;more or less lanceolate
|ray-floret presence=absent
|ray-floret quantity=8;26
|scale shape=subulate
|scale some measurement=2mm;5mm
|series quantity=4;6
|stem coloration=stramineous;reddish
|stem orientation=erect
|stem pubescence=glabrous
|whole-organism atypical some measurement=10cm;25cm
|whole-organism duration=perennial
|whole-organism some measurement=25cm;70cm
}}<!--

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[[Category:Treatment]]
[[Category:Grindelia]]
[[Category:Revised Since Print]]