View source for Symphyotrichum porteri

{{Treatment/ID
|accepted_name=Symphyotrichum porteri
|accepted_authority=(A. Gray) G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=77: 289. 1995
|year=1995
}}
|common_names=Porter’s or smooth white aster
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Aster porteri
|authority=A. Gray
|rank=species
|publication_title=Notes Compositae,
|publication_place=99. 1880
}}
|synonyms={{Treatment/ID/Synonym
|name=Aster ericoides var. strictus
|authority=Porter
|rank=variety
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Symphyotrichum;Symphyotrichum sect. Symphyotrichum;Symphyotrichum porteri
|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. Symphyotrichum]]</div><div class="higher-taxon"><small>species</small>[[Symphyotrichum porteri]]</div></div>
|volume=Volume 20
|mention_page=page 468, 500
|treatment_page=page 513
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 10–50 cm, cespitose; usually with branched caudices, sometimes long-rhizomatous. <b>Stems</b> 1–4+, ascending to erect (straight), glabrous. <b>Leaves</b> thin, margins usually entire, sometimes very sparsely serrulate distally, scabrous, apices acute, mucronulate, faces glabrous; basal usually deciduous at flowering (new winter rosettes developed by flowering), petiolate (petioles narrow or ± winged, then appearing sessile, slightly sheathing, ciliate), blades oblanceolate to obovate or spatulate, 5–45+ × 2–6 mm, cuneate, apices obtuse; proximal cauline usually withering by flowering, petiolate or sessile (petioles winged, slightly clasping, ciliate), blades oblanceolate or lanceolate to linear-oblanceolate or -lanceolate, 40–80(–90) × 2–5(–6) mm, bases cuneate; distal sessile, blades linear-lanceolate to linear, ± falcate, 8–60 × 0.5–3 mm, reduced distally, bases cuneate to rounded-cuneate. <b>Heads</b> in paniculiform arrays, branches ascending, ± densely leafy with narrow branch leaves. <b>Peduncles</b> 0.2–2.8 cm, bracteate, glabrous, bracts 1–3, linear to linear-lanceolate. <b>Involucres</b> campanulate to cylindro-campanulate, 3.6–5(–6) mm. <b>Phyllaries</b> in 4–6 series, linear-lanceolate to -oblanceolate (outer) or oblong-lanceolate (inner), unequal, bases indurate 1/4–3/4 (sometimes outermost foliaceous), margins proximally narrowly scarious, erose, hyaline, distally ciliolate, green zones lanceolate, apices acute, ± spreading, involute, mucronulate, faces glabrous. <b>Ray</b> florets (12–)20–34(–42); corollas usually white, seldom pinkish, laminae 6.8–12 × 0.7–1.8 mm. <b>Disc</b> florets (30–)40–75(–103); corollas pale yellow becoming pink and later brown, (2.8–)3.1–3.9(–4.9) mm, tubes much shorter than narrowly funnelform throats, lobes triangular, (0.3–)0.5–0.7(–0.8) mm. <b>Cypselae</b> purple to stramineous, obovoid to oblanceoloid, compressed, 1–2 mm, 4–5-nerved, faces sparsely, finely strigillose; pappi white, 1.2–3.5 mm. <b>2n</b> = 16.</span><!--

-->{{Treatment/Body
|phenology=Flowering late Jul–Sep.
|habitat=Lower montane
|elevation=1800–2900 m
|distribution=Colo.;N.Mex.;Wyo.
|discussion=<p><i>Symphyotrichum porteri</i> is the only western member of subsect. Porteriana; it grows in the foothills of the Rocky Mountains.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Symphyotrichum porteri
|authority=(A. Gray) G. L. Nesom
|rank=species
|parent rank=section
|synonyms=Aster ericoides var. strictus
|basionyms=Aster porteri
|family=Asteraceae
|phenology=Flowering late Jul–Sep.
|habitat=Lower montane
|elevation=1800–2900 m
|distribution=Colo.;N.Mex.;Wyo.
|reference=None
|publication title=Phytologia
|publication year=1995
|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_1144.xml
|tribe=Asteraceae tribe Astereae
|genus=Symphyotrichum
|subgenus=Symphyotrichum subg. Symphyotrichum
|section=Symphyotrichum sect. Symphyotrichum
|species=Symphyotrichum porteri
}}<!--

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