View source for Sonchus tenerrimus

{{Treatment/ID
|accepted_name=Sonchus tenerrimus
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 794. 1753
|year=1753
}}
|common_names=Slender sow-thistle
|special_status={{Treatment/ID/Special_status
|code=I
|label=Introduced
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Cichorieae;Sonchus;Sonchus tenerrimus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Cichorieae]]</div><div class="higher-taxon"><small>genus</small>[[Sonchus]]</div><div class="higher-taxon"><small>species</small>[[Sonchus tenerrimus]]</div></div>
|volume=Volume 19
|mention_page=page 274
|treatment_page=page 276
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole-organism duration;whole-organism some measurement;whole-organism duration;whole-organism duration"><b>Annual,</b> biennials, or perennials, 10–80 cm.</span> <span class="statement" id="st-d0_s1" data-properties="stem-base texture;stem-base growth form or texture;stem-base architecture"><b>Stem-</b>bases soft to hard, herbaceous, often hollow.</span> <span class="statement" id="st-d0_s2" data-properties="blade shape;base position;base position;base shape;base length;base width;base shape;base shape;base shape;auricle position;auricle position;auricle shape;auricle length;auricle width;auricle shape;auricle shape;auricle shape;margin arrangement or course or shape;margin course;margin shape;margin shape;lobe arrangement or course or shape;lobe course;lobe shape;lobe shape;terminal architecture or shape;terminal architecture or shape;lateral variability"><b>Leaves:</b> blades of mid cauline oblong, 3–20 × 2–6 cm, bases auriculate, auricles ovate to lanceolate or linear, ± straight, obtuse to acute, margins usually pinnately lobed, lobes ± rhombic to lanceolate (constricted at bases) or ± linear, terminals ± equaling laterals, entire or dentate.</span> <span class="statement" id="st-d0_s3" data-properties="peduncle pubescence;peduncle pubescence;peduncle pubescence"><b>Peduncles </b>usually setose to stipitate-glandular, often tomentose as well, sometimes glabrous.</span> <span class="statement" id="st-d0_s4" data-properties="involucre some measurement"><b>Involucres </b>10–12+ mm.</span> <span class="statement" id="st-d0_s5" data-properties="phyllary pubescence;phyllary pubescence"><b>Phyllaries </b>usually setose to stipitate-glandular, sometimes tomentose as well.</span> <span class="statement" id="st-d0_s6" data-properties="ligule length or size"><b>Corollas:</b> ligules longer than tubes.</span> <span class="statement" id="st-d0_s7" data-properties="cypsela coloration;cypsela shape;cypsela some measurement;rib quantity;face relief;face relief"><b>Cypselae </b>reddish-brown, oblanceoloid, 2.5–3.5 mm, ribs 1–3 on each face, faces transversely rugulose or tuberculate across and between ribs;</span> <span class="statement" id="st-d0_s8" data-properties="pappus some measurement;2n chromosome quantity">pappi 5–8 mm. <b>2n</b> = 14.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Jun.
|habitat=Disturbed sites, often on ballast
|elevation=0–200 m
|distribution=Calif.;s Europe;w Asia;n Africa
|introduced=true
|discussion=<p>Sonchus tenerrimus was known historically on ballast from Alabama, Pennsylvania (Philadelphia), New Jersey, New York, and, possibly, Quebec.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Sonchus tenerrimus
|authority=Linnaeus
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering Mar–Jun.
|habitat=Disturbed sites, often on ballast
|elevation=0–200 m
|distribution=Calif.;s Europe;w Asia;n Africa
|introduced=true
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=Introduced
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V19_382.xml
|tribe=Asteraceae tribe Cichorieae
|genus=Sonchus
|species=Sonchus tenerrimus
|2n chromosome quantity=14
|auricle length=3cm;20cm
|auricle position=cauline;mid
|auricle shape=lobed;ovate;lanceolate
|auricle width=2cm;6cm
|base length=3cm;20cm
|base position=cauline;mid
|base shape=lobed;ovate;lanceolate
|base width=2cm;6cm
|blade shape=less rhombic;lanceolate or more or less linear
|cypsela coloration=reddish-brown
|cypsela shape=oblanceoloid
|cypsela some measurement=2.5mm;3.5mm
|face relief=tuberculate;rugulose
|involucre some measurement=10mm;12mm
|lateral variability=equaling
|ligule length or size=longer
|lobe arrangement or course or shape=linear
|lobe course=straight
|lobe shape=lobed;obtuse;acute
|margin arrangement or course or shape=linear
|margin course=straight
|margin shape=lobed;obtuse;acute
|pappus some measurement=5mm;8mm
|peduncle pubescence=glabrous;tomentose;usually setose;stipitate-glandular
|phyllary pubescence=tomentose;usually setose;stipitate-glandular
|rib quantity=1;3
|stem-base architecture=hollow
|stem-base growth form or texture=herbaceous
|stem-base texture=soft;hard
|terminal architecture or shape=dentate;entire
|whole-organism duration=perennial;biennial;annual
|whole-organism some measurement=10cm;80cm
}}<!--

-->[[Category:Treatment]][[Category:Sonchus]]