View source for Senecio flaccidus

{{Treatment/ID
|accepted_name=Senecio flaccidus
|accepted_authority=Lessing
|publications={{Treatment/Publication
|title=Linnaea
|place=5: 161. 1830
|year=1830
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Senecioneae;Senecio;Senecio flaccidus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Senecioneae]]</div><div class="higher-taxon"><small>genus</small>[[Senecio]]</div><div class="higher-taxon"><small>species</small>[[Senecio flaccidus]]</div></div>
|volume=Volume 20
|mention_page=page 548, 559
|treatment_page=page 558
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism atypical some measurement;whole_organism some measurement;whole_organism growth form;whole_organism atypical some measurement;whole_organism some measurement;whole_organism growth form"><b>Subshrubs </b>or shrubs, (30–) 40–120+ cm (taproots forming woody crowns).</span> <span class="statement" id="st-d0_s1" data-properties="herbage pubescence;herbage pubescence"><b>Herbage </b>glabrous or ± lanate-tomentose.</span> <span class="statement" id="st-d0_s2" data-properties="stem quantity"><b>Stems </b>usually multiple (little branched, arching-erect).</span> <span class="statement" id="st-d0_s3" data-properties=""><b>Leaves </b>± evenly distributed;</span> <span class="statement" id="st-d0_s4" data-properties="leaf arrangement;leaf architecture;leaf architecture">sessile or obscurely petiolate;</span> <span class="statement" id="st-d0_s5" data-properties="blade shape;blade atypical some measurement;blade some measurement;base arrangement or course or shape;ultimate margin shape;ultimate margin shape">blades narrowly linear to filiform (or pinnatifid, the segments linear to filiform), 3–10 (–12) cm, bases ± linear, ultimate margins entire or remotely toothed (fascicles of smaller leaves sometimes borne in axils of larger leaves).</span> <span class="statement" id="st-d0_s6" data-properties="head atypical quantity;head atypical quantity;head quantity;array arrangement;array size;array prominence"><b>Heads </b>(1–) 3–10 (–20+) in corymbiform or subcorymbiform clusters, often gathered in larger, showy arrays (involucres campanulate or cylindric).</span> <span class="statement" id="st-d0_s7" data-properties="bractlet quantity;bractlet presence"><b>Calyculi </b>usually of 3–5+ bractlets (lengths often to 1/2+ phyllaries), sometimes 0.</span> <span class="statement" id="st-d0_s8" data-properties="phyllarie quantity;phyllarie quantity;phyllarie quantity;phyllarie atypical some measurement;phyllarie some measurement;tip coloration;tip coloration"><b>Phyllaries </b>± 13 or ± 21+, 5–10 (–12) mm, tips green or minutely black.</span> <span class="statement" id="st-d0_s9" data-properties="ray-floret quantity;ray-floret quantity;ray-floret quantity;ray-floret quantity"><b>Ray-</b>florets usually ± 8 or ± 13, sometimes ± 21;</span> <span class="statement" id="st-d0_s10" data-properties="corolla lamina atypical some measurement;corolla lamina some measurement">corolla laminae 10–15 (–20) mm (mostly yellow, sometimes ochroleucous).</span> <span class="statement" id="st-d0_s11" data-properties=""><b>Cypselae </b>hairy.</span> <span class="statement" id="st-d0_s12" data-properties="cypsela pubescence;2n chromosome quantity">2n = 40.</span><!--

-->{{Treatment/Body
|distribution=Ariz.;Calif.;Colo.;Kans.;N.Mex.;Nev.;Okla.;Tex.;Utah;Mexico
|discussion=<p>Varieties 3 (3 in the flora).</p><!--
--><p>The varieties of Senecio flaccidus are distinguished by morphologic tendencies and geography. The species occurs southward to central Mexico; a sound understanding of the infraspecific taxonomy must await revisionary studies that include the Mexican plants.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Herbage usually tomentose (hairs whitish), sometimes unevenly glabrescent; bractlets of calyculi minute or 0; involucres cylindric or ± campanulate; phyllaries ± 13 or ± 21, 5–8+ mm
|[[Senecio flaccidus var. flaccidus|Senecio flaccidus var. flaccidus]]
|-id=key-0-1
|1
|Herbage ± tomentose, glabrate, or glabrous; bractlets of calyculi well developed (lengths mostly 1/3 – 1/2 phyllaries); involucres ± campanulate; phyllaries ± 21, 7–12 mm
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Plants usually ± tomentose (usually with persistent, uneven grayish tomentum), sometimes unevenly glabrescent; California w of crests of Sierra Nevada and related ranges
|[[Senecio flaccidus var. douglasii|Senecio flaccidus var. douglasii]]
|-id=key-0-2
|2
|Plants glabrate or glabrous; California deserts e of crest of Sierra Nevada and eastward
|[[Senecio flaccidus var. monoensis|Senecio flaccidus var. monoensis]]
|}
</div></div><!--

-->{{#Taxon:
name=Senecio flaccidus
|authority=Lessing
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|distribution=Ariz.;Calif.;Colo.;Kans.;N.Mex.;Nev.;Okla.;Tex.;Utah;Mexico
|reference=None
|publication title=Linnaea
|publication year=1830
|special status=Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V20_1238.xml
|tribe=Asteraceae tribe Senecioneae
|genus=Senecio
|species=Senecio flaccidus
|2n chromosome quantity=40
|array arrangement=cluster
|array prominence=showy
|array size=larger
|base arrangement or course or shape=linear
|blade atypical some measurement=10cm;12cm
|blade shape=narrowly linear;filiform
|blade some measurement=3cm;10cm
|bractlet presence=absent
|bractlet quantity=3;5
|corolla lamina atypical some measurement=15mm;20mm
|corolla lamina some measurement=10mm;15mm
|cypsela pubescence=hairy
|head atypical quantity=10;20
|head quantity=3;10
|herbage pubescence=lanate-tomentose;glabrous
|leaf architecture=petiolate;sessile
|leaf arrangement=distributed
|phyllarie atypical some measurement=10mm;12mm
|phyllarie quantity=more or less;13
|phyllarie some measurement=5mm;10mm
|ray-floret quantity=21;13;more or less;8
|stem quantity=multiple
|tip coloration=black;green
|ultimate margin shape=toothed;entire
|whole_organism atypical some measurement=30cm;40cm
|whole_organism growth form=shrub;subshrub
|whole_organism some measurement=40cm;120cm
}}<!--

-->[[Category:Treatment]][[Category:Senecio]]