View source for Symphyotrichum spathulatum

{{Treatment/ID
|accepted_name=Symphyotrichum spathulatum
|accepted_authority=(Lindley) G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=77: 291. 1995
|year=1995
}}
|common_names=Western mountain aster
|basionyms={{Treatment/ID/Basionym
|name=Aster spathulatus
|authority=Lindley
|publication_title=in W. J. Hooker, Fl. Bor.-Amer.
|publication_place=2: 8. 1834
}}
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Symphyotrichum;Symphyotrichum sect. Occidentales;Symphyotrichum spathulatum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Astereae]]</div><div class="higher-taxon"><small>genus</small>[[Symphyotrichum]]</div><div class="higher-taxon"><small>subgenus</small>[[Symphyotrichum subg. Symphyotrichum]]</div><div class="higher-taxon"><small>section</small>[[Symphyotrichum sect. Occidentales]]</div><div class="higher-taxon"><small>species</small>[[Symphyotrichum spathulatum]]</div></div>
|volume=Volume 20
|mention_page=page 477, 537, 538
|treatment_page=page 534
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 20–80 cm, colonial; long-rhizomatous. <b>Stems</b> 1–5+, ascending to erect, glabrous or sparsely puberulent. <b>Leaves</b> thin, margins entire, apices acute, faces glabrous or sparsely puberulent; basal persistent, petiolate, blades narrowly elliptic to obovate, 50–150 × 3–15 mm, attenuate, margins entire; proximal cauline sessile or subpetiolate, blades linear to narrowly elliptic, 50–150 × 2–15 mm, bases attenuate or cuneate; distal sessile, blades 30–60 × 2–10 mm, reduced distally, bases cuneate to rounded. <b>Heads</b> in corymbiform to paniculiform arrays, branches usually few. <b>Peduncles</b> sparsely hairy, bracts 0–3+. <b>Involucres</b> campanulate, 5–10 mm. <b>Phyllaries</b> in 3–5 series, narrowly oblong or linear (outer) to linear (inner), unequal, bases indurate, margins entire, green zones elliptic to lanceolate, apices usually acute, sometimes obtuse, faces glabrous or ± puberulent. <b>Ray</b> florets 15–40; corollas violet, laminae 9–15 × 1–2 mm. <b>Disc</b> florets 30-80(–100); corollas yellow, sometimes becoming reddish, 4.5–6 mm, lobes triangular, 0.5–1 mm. <b>Cypselae</b> brown, cylindric to obovoid, not compressed, 2.5–3.5 mm, ± 4-nerved, faces hairy; pappi whitish, 5–7 mm.</span><!--

-->{{Treatment/Body
|distribution=w North America;nw Mexico.
|discussion=<p>Varieties 3 (3 in the flora).</p><!--
--><p><i>Symphyotrichum spathulatum</i> is a variable species, widespread in montane regions of western North America. It hybridizes with <i>S. eatonii</i>, <i>S. foliaceum</i>, and <i>S. hendersonii</i>.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaves linear
|[[Symphyotrichum spathulatum var. yosemitanum|Symphyotrichum spathulatum var. yosemitanum]]
|-id=key-0-1
|1
|Leaves narrowly elliptic to oblanceolate
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Plants 40–80 cm; heads usually 10–50
|[[Symphyotrichum spathulatum var. intermedium|Symphyotrichum spathulatum var. intermedium]]
|-id=key-0-2
|2
|Plants 20–50(–60) cm; head usually 3–10
|[[Symphyotrichum spathulatum var. spathulatum|Symphyotrichum spathulatum var. spathulatum]]
|}
</div></div><!--

-->{{#Taxon:
name=Symphyotrichum spathulatum
|author=
|authority=(Lindley) G. L. Nesom
|rank=species
|parent rank=section
|synonyms=
|basionyms=Aster spathulatus
|family=Asteraceae
|distribution=w North America;nw Mexico.
|reference=None
|publication title=Phytologia
|publication year=1995
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V20_1191.xml
|tribe=Asteraceae tribe Astereae
|genus=Symphyotrichum
|subgenus=Symphyotrichum subg. Symphyotrichum
|section=Symphyotrichum sect. Occidentales
|species=Symphyotrichum spathulatum
}}<!--

-->[[Category:Treatment]][[Category:Symphyotrichum sect. Occidentales]]