View source for Arnica louiseana

{{Treatment/ID
|accepted_name=Arnica louiseana
|accepted_authority=Farr
|publications={{Treatment/Publication
|title=Ottawa Naturalist
|place=20: 109. 1906
|year=1906
}}
|common_names=Lake Louise arnica;snow arnica
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Chaenactidinae;Arnica;Arnica louiseana
|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 louiseana]]</div></div>
|volume=Volume 21
|mention_page=page 368
|treatment_page=page 371
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>5–20 cm. <b>Stems</b> simple. <b>Leaves</b> 1–3 pairs, mostly cauline (shorter plants often with leaves crowed mostly toward bases); petiolate; blades elliptic, oblong, or ovate-lanceolate, 1.5–7.5 × 0.5–2 cm, margins usually entire, rarely denticulate or slightly undulate, apices usually obtuse, sometimes acute or acuminate, faces glabrous or hispidulous-puberulent, ± densely stipitate-glandular. <b>Heads</b> usually 1, sometimes 2–3 (nodding at flowering). <b>Involucres</b> campanulate-turbinate. <b>Phyllaries</b> 10–20, narrowly lanceolate (stipitate-glandular). <b>Ray</b> florets 7–10; corollas yellow. <b>Disc</b> florets: corollas yellow; anthers yellow. <b>Cypselae</b> brown, 3–5 mm, abaxially glabrous, adaxially sparsely hirsute or glabrous throughout, usually stipitate-glandular toward apices, sometimes densely stipitate-glandular throughout; pappi white, bristles barbellate. <b>2n</b> = 76, 95.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Aug.
|habitat=Exposed tundra slopes and calcareous rock slides
|elevation=1800–2100 m
|distribution=Alta.;B.C.
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Arnica louiseana
|author=
|authority=Farr
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering Jul–Aug.
|habitat=Exposed tundra slopes and calcareous rock slides
|elevation=1800–2100 m
|distribution=Alta.;B.C.
|reference=None
|publication title=Ottawa Naturalist
|publication year=1906
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_928.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae
|genus=Arnica
|species=Arnica louiseana
}}<!--

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