View source for Crepis occidentalis

{{Treatment/ID
|accepted_name=Crepis occidentalis
|accepted_authority=Nuttall
|publications={{Treatment/Publication
|title=J. Acad. Nat. Sci. Philadelphia
|place=7: 29. 1834
|year=1834
}}
|common_names=Gray or western hawksbeard
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Psilochenia occidentalis
|authority=(Nuttall) Nuttall
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Cichorieae;Crepis;Crepis occidentalis
|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>[[Crepis]]</div><div class="higher-taxon"><small>species</small>[[Crepis occidentalis]]</div></div>
|volume=Volume 19
|mention_page=page 225, 226
|treatment_page=page 232
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 8–40 cm; taproots deep, caudices swollen, (often covered with old leaf bases). <b>Stems</b> 1–3, erect, stout, branched from bases or beyond, hispid, tomentose, or tomentulose, sometimes stipitate-glandular distally. <b>Leaves</b> basal and cauline; petiolate; blades elliptic, runcinate, (5–)8–20 × 2–5 cm, margins pinnately-lobed to sinuously dentate (lobes broadly lanceolate, often dentate), apices acute or acuminate, faces gray-tomentose, sometimes stipitate-glandular. <b>Heads</b> 2–30, in loose corymbiform arrays. <b>Calyculi</b> of 6–8, lanceolate or linear, glabrate to tomentose bractlets 2–6 mm. <b>Involucres</b> cylindric, 11–19 × 5–10 mm. <b>Phyllaries</b> 7–13, lanceolate, 12–15 mm, (bases thickened, keeled, margins green, often scarious) apices acute or acuminate, abaxial faces gray-tomentose, sometimes setose (setae black or greenish) or stipitate-glandular, adaxial glabrous or with fine hairs. <b>Florets</b> 10–40; corollas yellow, 18–22 mm. <b>Cypselae</b> golden or dark brown, subcylindric, 6–10 mm, apices tapered (not beaked), ribs 10–18, strong and rounded; pappi yellowish white, 10–12 mm (bristles unequal). <b>2n</b> = 22, 33, 44, 55, 66, 77, 88.</span><!--

-->{{Treatment/Body
|distribution=Alta.;B.C.;Sask.;Ariz.;Calif.;Colo.;Idaho;Mont.;N.Mex.;Nev.;Oreg.;S.Dak.;Utah;Wash.;Wyo.
|discussion=<p>Subspecies 4 (4 in the flora).</p><!--
--><p><i>Crepis occidentalis</i> is recognized by the old, brown leaf bases persisting on caudices, by stems, leaves, and phyllaries gray-tomentose, and by loose, corymbiform arrays with relatively few, relatively large heads. It is widespread and polymorphic. Some specimens have coarse setae or black, stipitate glands on the phyllaries in addition to the tomentose indument, the stipitate glands sometimes extending proximally on stems. Four intergrading subspecies were recognized by E. B. Babcock (1947). The sexual diploid forms are found in <i></i>subsp.<i> occidentalis</i> and occur in northern California and adjacent <i>Nevada</i>. The other subspecies are polyploid and apomictic (Babcock).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Phyllaries sparsely to densely stipitate-glandular
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Phyllaries 8–12, usually eglandular, if glandular, phyllaries 8
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Phyllaries (peduncles and distal cauline leaves) stipitate-glandular (lacking large dark or black glandular setae); phyllaries 7–8 or 10–13; florets 18–30
|[[Crepis occidentalis subsp. occidentalis|Crepis occidentalis subsp. occidentalis]]
|-id=key-0-2
|2
|Phyllaries (peduncles and distal cauline leaves) stipitate-glandular (and with dark or black, glandular setae); phyllaries 8, florets 10–14
|[[Crepis occidentalis subsp. costata|Crepis occidentalis subsp. costata]]
|-id=key-0-3
|3
|Plants 10–40 cm (stems with definite primary axes, branched distally; phyllaries mostly 8; leaves coarsely dentate or pinnately lobed (lobes closely spaced)
|[[Crepis occidentalis subsp. pumila|Crepis occidentalis subsp. pumila]]
|-id=key-0-3
|3
|Plants 5–20 cm (stems branched proximally; phyllaries 8–12; leaves deeply pinnately lobed (lobes remotely spaced, lanceolate, or linear, entire or dentate)
|[[Crepis occidentalis subsp. conjuncta|Crepis occidentalis subsp. conjuncta]]
|}
</div></div><!--

-->{{#Taxon:
name=Crepis occidentalis
|authority=Nuttall
|rank=species
|parent rank=genus
|synonyms=Psilochenia occidentalis
|basionyms=
|family=Asteraceae
|distribution=Alta.;B.C.;Sask.;Ariz.;Calif.;Colo.;Idaho;Mont.;N.Mex.;Nev.;Oreg.;S.Dak.;Utah;Wash.;Wyo.
|reference=None
|publication title=J. Acad. Nat. Sci. Philadelphia
|publication year=1834
|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_296.xml
|tribe=Asteraceae tribe Cichorieae
|genus=Crepis
|species=Crepis occidentalis
}}<!--

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[[Category:Crepis]]
[[Category:Revision Pending]]