View source for Packera tridenticulata

{{Treatment/ID
|accepted_name=Packera tridenticulata
|accepted_authority=(Rydberg) W. A. Weber & Á. Löve
|publications={{Treatment/Publication
|title=Phytologia
|place=49: 48. 1981
|year=1981
}}
|common_names=Threetooth ragwort
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Senecio tridenticulatus
|authority=Rydberg
|rank=species
|publication_title=Bull. Torrey Bot. Club
|publication_place=27: 175, plate 5, fig. 12. 1900
}} {{Treatment/ID/Basionym
|name=Senecio compactus
|authority=(A. Gray) Rydberg
|rank=species
|publication_title=
|publication_place=1894
}}
|synonyms={{Treatment/ID/Synonym
|name=Senecio acutidens
|authority=Rydberg
|rank=species
}} {{Treatment/ID/Synonym
|name=Senecio densus
|authority=Greene
|rank=species
}} {{Treatment/ID/Synonym
|name=Senecio oblanceolatus
|authority=Rydberg
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Senecioneae;Packera;Packera tridenticulata
|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>[[Packera]]</div><div class="higher-taxon"><small>species</small>[[Packera tridenticulata]]</div></div>
|volume=Volume 20
|mention_page=page 573, 593, 602
|treatment_page=page 601
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 10–30+ cm; taprooted (caudices ascending to erect). <b>Stems</b> 1 or multiple, clustered, usually glabrous, rarely sparsely floccose-tomentose, leaf axils sometimes tomentose. <b>Basal</b> leaves (and proximal cauline, relatively thick and turgid) petiolate; blades lanceolate or narrowly oblanceolate, 20–40+ × 5–15 mm, bases tapering, margins usually entire, sometimes sub-pinnatisect (apices subentire or dentate). <b>Cauline</b> leaves gradually reduced (± petiolate or sessile). <b>Heads</b> 4–15+ in corymbiform arrays. <b>Peduncles</b> bracteate, glabrous or sparsely tomentose. <b>Calyculi</b> inconspicuous. <b>Phyllaries</b> 13 or 21, green, 6–10 mm, sparsely tomentose proximally, glabrous distally. <b>Ray</b> florets 8–10(–13); corolla laminae 5–8+ mm. <b>Disc</b> florets 45–60+; corolla tubes 3–3.5 mm, limbs 4–5 mm. <b>Cypselae</b> 1.5–2.5 mm, glabrous or sparsely hirtellous on ribs; pappi 5–6 mm. <b>2n</b> = 46.</span><!--

-->{{Treatment/Body
|phenology=Flowering late May–early Jul.
|habitat=Open, dry areas, roadsides, gravelly or sandy slopes, short-grass prairies or sagebrush scrubs
|elevation=1000–2000 m
|distribution=Colo.;Kans.;Nebr.;N.Mex.;N.Dak.;Okla.;S.Dak.;Tex.;Wyo.
|discussion=<p><i>Packera tridenticulata</i> is found throughout the central High Plains, in the foothills of the Rocky Mountains, and in high valleys to the west of the Rocky Mountain front. It tends to grow in clumps; the multiple stems arise from well-developed taproots. It apparently hybridizes with <i>P. neomexicana </i>var.<i> mutabilis</i> where their ranges overlap.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Packera tridenticulata
|authority=(Rydberg) W. A. Weber & Á. Löve
|rank=species
|parent rank=genus
|synonyms=Senecio acutidens;Senecio densus;Senecio oblanceolatus
|basionyms=Senecio tridenticulatus;Senecio compactus
|family=Asteraceae
|phenology=Flowering late May–early Jul.
|habitat=Open, dry areas, roadsides, gravelly or sandy slopes, short-grass prairies or sagebrush scrubs
|elevation=1000–2000 m
|distribution=Colo.;Kans.;Nebr.;N.Mex.;N.Dak.;Okla.;S.Dak.;Tex.;Wyo.
|reference=None
|publication title=Phytologia
|publication year=1981
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V20_1350.xml
|tribe=Asteraceae tribe Senecioneae
|genus=Packera
|species=Packera tridenticulata
}}<!--

-->[[Category:Treatment]][[Category:Packera]]