View source for Cirsium douglasii

{{Treatment/ID
|accepted_name=Cirsium douglasii
|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=6: 643. 1838
|year=1838
}}
|common_names=California swamp or Douglas’s thistle
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Cardueae;Cirsium;Cirsium douglasii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Cardueae]]</div><div class="higher-taxon"><small>genus</small>[[Cirsium]]</div><div class="higher-taxon"><small>species</small>[[Cirsium douglasii]]</div></div>
|volume=Volume 19
|mention_page=page 104, 108, 160
|treatment_page=page 133
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Biennials </b>or short-lived monocarpic perennials, 60–250 cm; taprooted. <b>Stems</b> 1–several, erect or ascending, densely gray-tomentose; branches few–many, ascending to spreading. <b>Leaves</b>: blades oblong-elliptic to obovate, 10–60 × 2–15 cm, unlobed or shallowly to deeply pinnatifid, lobes lanceolate to ovate-triangular, ascending to spreading, entire to coarsely dentate or lobed, main spines slender to stout, 2–30 mm, faces densely gray-tomentose, rarely glabrate; basal present at flowering, petiolate; principal cauline well distributed, proximal winged-petiolate, distal sessile, bases auriculate-clasping or decurrent as a spiny wing 1–3 cm; distalmost well separated, bractlike. <b>Heads</b> 10–many, often crowded at branch tips, collectively forming paniculiform arrays. <b>Peduncles</b> 0–4(–8) cm. <b>Involucres</b> ovoid to hemispheric, 1.5–3 cm, 2–4.5 cm diam, loosely arachnoid on phyllary margins or glabrate. <b>Phyllaries</b> in 6–8 series, imbricate, often with dark purple patch near tip, ovate-lanceolate (outer) to linear-lanceolate (inner), abaxial faces with linear to elliptic glutinous ridge; outer and middle appressed, entire, spines spreading, 1–9 mm; apices of inner often purple-tinged, often flexuous, flattened, spineless, scabrid. <b>Corollas</b> rose-purple (white or pinkish-tinged), 18–21 mm, tubes 8–9 mm, throats 5–6 mm (abruptly expanded), lobes 5–6 mm; style tips 3–4.5 mm. <b>Cypselae</b> dark brown to black, 5–6 mm, apical collars not differentiated; pappi 15–20 mm.</span><!--

-->{{Treatment/Body
|distribution=Calif.;Nev.;Oreg.
|discussion=<p>Varieties 2 (2 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Distal cauline leaves with larger spines mostly less than 7 mm
|[[Cirsium douglasii var. breweri|Cirsium douglasii var. breweri]]
|-id=key-0-1
|1
|Distal cauline leaves with larger spines usually 7–20 mm
|[[Cirsium douglasii var. douglasii|Cirsium douglasii var. douglasii]]
|}
</div></div><!--

-->{{#Taxon:
name=Cirsium douglasii
|authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|distribution=Calif.;Nev.;Oreg.
|reference=None
|publication title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|publication year=1838
|special status=Illustrated;Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V19_104.xml
|tribe=Asteraceae tribe Cardueae
|genus=Cirsium
|species=Cirsium douglasii
}}<!--

-->[[Category:Treatment]][[Category:Cirsium]]