View source for Arnica discoidea

{{Treatment/ID
|accepted_name=Arnica discoidea
|accepted_authority=Bentham
|publications={{Treatment/Publication
|title=Pl. Hartw.,
|place=319. 1849
|year=1849
}}
|common_names=Rayless arnica
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Arnica alata
|authority=Rydberg
|rank=species
}} {{Treatment/ID/Synonym
|name=Arnica cordifolia var. eradiata
|authority=A. Gray
|rank=variety
}} {{Treatment/ID/Synonym
|name=Arnica discoidea var. alata
|authority=(Rydberg) Cronquist
|rank=variety
}} {{Treatment/ID/Synonym
|name=Arnica discoidea var. eradiata
|authority=(A. Gray) Cronquist
|rank=variety
}} {{Treatment/ID/Synonym
|name=Arnica parviflora
|authority=
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Chaenactidinae;Arnica;Arnica discoidea
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Chaenactidinae]]</div><div class="higher-taxon"><small>genus</small>[[Arnica]]</div><div class="higher-taxon"><small>species</small>[[Arnica discoidea]]</div></div>
|volume=Volume 21
|mention_page=page 367
|treatment_page=page 375
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>15–60 cm. <b>Stems</b> mostly simple or distally branched. <b>Leaves</b> 3–7 pairs, sometimes crowded at stem bases (basal leaves often persistent on sterile rosettes); petiolate (petioles narrow, 1.5–8 cm, often broadly winged on distal reduced leaves); blades usually ovate to broadly lanceolate, seldom subcordate, 2–12 × 1–7 cm, margins usually serrate to coarsely dentate or crenate, rarely subentire, faces glabrate to pilose, stipitate-glandular. <b>Heads</b> 3–10(–30; erect). <b>Involucres</b> turbinate-campanulate. <b>Phyllaries</b> 8–15, ovate-lanceolate to narrowly lanceolate. <b>Ray</b> florets usually 0 (corollas of peripheral florets rarely dilated, resembling rays). <b>Disc</b> florets 20–50; corollas yellow; anthers yellow. <b>Cypselae</b> dark gray, 6–8 mm, hirsute (hairs duplex) and stipitate-glandular; pappi white, bristles usually barbellate, sometimes subplumose. <b>2n</b> = 38, 57, 76.</span><!--

-->{{Treatment/Body
|phenology=Flowering May–Jul.
|habitat=Chaparral, oak and pine forests
|elevation=100–1500 m
|distribution=Calif.;Nev.;Oreg.;Wash.
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Arnica discoidea
|authority=Bentham
|rank=species
|parent rank=genus
|synonyms=Arnica alata;Arnica cordifolia var. eradiata;Arnica discoidea var. alata;Arnica discoidea var. eradiata;Arnica parviflora
|basionyms=
|family=Asteraceae
|phenology=Flowering May–Jul.
|habitat=Chaparral, oak and pine forests
|elevation=100–1500 m
|distribution=Calif.;Nev.;Oreg.;Wash.
|reference=None
|publication title=Pl. Hartw.,
|publication year=1849
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V21_942.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae
|genus=Arnica
|species=Arnica discoidea
}}<!--

-->[[Category:Treatment]][[Category:Arnica]]