View source for Grindelia microcephala

{{Treatment/ID
|accepted_name=Grindelia microcephala
|accepted_authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
|publications={{Treatment/Publication
|title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|place=5: 315. 1836
|year=1836
}}
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Grindelia;Grindelia microcephala
|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 microcephala]]</div></div>
|volume=Volume 20
|mention_page=page 427
|treatment_page=page 430
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole-organism some measurement;whole-organism duration"><b>Annuals,</b> 15–40 cm.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem coloration;stem pubescence;stem pubescence"><b>Stems </b>erect, stramineous, ± villous and/or stipitate-glandular.</span> <span class="statement" id="st-d0_s2" data-properties="cauline blade-leaf shape;cauline blade-leaf shape;cauline blade-leaf atypical distance;cauline blade-leaf distance;cauline blade-leaf l w ratio;base architecture or fixation;margin shape;apex shape;apex shape;face pubescence;face architecture or function or pubescence;face pubescence"><b>Cauline </b>leaf-blades ± oblong or spatulate, 10–30 (–45+) mm, lengths 2–3.5 times widths, bases clasping, margins ± crenulate (teeth 6–8 per cm, obtuse, resin-tipped), apices obtuse or acute, faces usually hirtellous and glandular (glands usually in pits, seldom sessile or stipitate), sometimes glabrate.</span> <span class="statement" id="st-d0_s3" data-properties="array architecture;array architecture"><b>Heads </b>in open, corymbiform arrays.</span> <span class="statement" id="st-d0_s4" data-properties="involucre shape;involucre length;involucre width"><b>Involucres </b>broadly urceolate to hemispheric, 6–9 × 8–13 mm (usually subtended by leaflike bracts).</span> <span class="statement" id="st-d0_s5" data-properties="phyllarie orientation;phyllarie shape;series quantity;apex shape;apex orientation;apex course;apex coating"><b>Phyllaries </b>in 5–6 series, spreading to appressed, lanceolate, apices acute to subulate, slightly recurved to straight, little, or not at all, resinous.</span> <span class="statement" id="st-d0_s6" data-properties="ray-floret quantity"><b>Ray-</b>florets 16–27;</span> <span class="statement" id="st-d0_s7" data-properties="lamina atypical some measurement;lamina some measurement">laminae 6–9 (–12) mm.</span> <span class="statement" id="st-d0_s8" data-properties="cypsela coloration;cypsela some measurement;apex architecture or pubescence or relief;apex shape;face relief;face relief"><b>Cypselae </b>brownish, 3.5–4 mm, apices smooth or obscurely coronate, faces smooth or slightly rugose (little, if at all, transversely fissured);</span> <span class="statement" id="st-d0_s9" data-properties="bristle quantity;bristle course;bristle arrangement or shape;bristle architecture or pubescence or relief;awn shape;awn some measurement">pappi of 2–3 straight or weakly contorted, smooth (apices dilated), bristles or setiform awns 3.5–5 mm, equaling or slightly surpassing disc corollas.</span> <span class="statement" id="st-d0_s10" data-properties="pappus variability;pappus variability;2n chromosome quantity">2n = 12.</span><!--

-->{{Treatment/Body
|phenology=Flowering (Nov–)Mar–Jun(–Aug).
|habitat=Bottomlands, rich low ground, thickets, near streams
|elevation=0–500 m
|distribution=Tex.
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Grindelia microcephala
|authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering (Nov–)Mar–Jun(–Aug).
|habitat=Bottomlands, rich low ground, thickets, near streams
|elevation=0–500 m
|distribution=Tex.
|reference=None
|publication title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|publication year=1836
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V20_988.xml
|tribe=Asteraceae tribe Astereae
|genus=Grindelia
|species=Grindelia microcephala
|2n chromosome quantity=12
|apex architecture or pubescence or relief=smooth
|apex coating=resinous
|apex course=straight
|apex orientation=recurved
|apex shape=coronate;acute;subulate
|array architecture=corymbiform;open
|awn shape=setiform
|awn some measurement=3.5mm;5mm
|base architecture or fixation=clasping
|bristle architecture or pubescence or relief=smooth
|bristle arrangement or shape=contorted
|bristle course=straight
|bristle quantity=2;3
|cauline blade-leaf atypical distance=30mm;45mm
|cauline blade-leaf distance=10mm;30mm
|cauline blade-leaf l w ratio=2-3.5
|cauline blade-leaf shape=spatulate;oblong
|cypsela coloration=brownish
|cypsela some measurement=3.5mm;4mm
|face architecture or function or pubescence=glandular
|face pubescence=glabrate;hirtellous
|face relief=rugose;smooth
|involucre length=6mm;9mm
|involucre shape=broadly urceolate;hemispheric
|involucre width=8mm;13mm
|lamina atypical some measurement=9mm;12mm
|lamina some measurement=6mm;9mm
|margin shape=crenulate
|pappus variability=slightly surpassing disc corollas;equaling
|phyllarie orientation=spreading;appressed
|phyllarie shape=lanceolate
|ray-floret quantity=16;27
|series quantity=5;6
|stem coloration=stramineous
|stem orientation=erect
|stem pubescence=stipitate-glandular;villous
|whole-organism duration=annual
|whole-organism some measurement=15cm;40cm
}}<!--

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