View source for Symphyotrichum ×amethystinum

{{Treatment/ID
|accepted_name=Symphyotrichum ×amethystinum
|accepted_authority=(Nuttall) G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=77: 294. 1995
|year=1995
}}
|common_names=Amethyst aster
|basionyms={{Treatment/ID/Basionym
|name=Aster amethystinus
|authority=Nuttall
|publication_title=Trans. Amer. Philos. Soc., n. s.
|publication_place=7: 294. 1840
}}
|synonyms={{Treatment/ID/Synonym
|name=Virgulus ×amethystinus
|authority=(Nuttall) Reveal & Keener
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Virgulus;Symphyotrichum ×amethystinum
|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. Virgulus]]</div><div class="higher-taxon"><small>species</small>[[Symphyotrichum ×amethystinum]]</div></div>
|volume=Volume 20
|mention_page=page 471, 472, 483, 487, 488, 498
|treatment_page=page 497
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> cespitose, 30–120 cm; with thick, woody, short-branched caudices at ends of fleshy rhizomes. <b>Stems</b> 1–5+, erect (light brown to grayish brown), densely hispidulo-hirsute. <b>Leaves</b> light green, thin to firm; basal withering by flowering, sessile, blades oblanceolate, 10–40 × 3–10 mm, attenuate, margins usually entire, rarely remotely serrate, piloso-ciliate, apices obtuse, rounded to mucronulate, faces sparsely to moderately strigose; proximal cauline sometimes persistent by flowering, sessile, blades linear or oblong to elliptic-oblanceolate, 40–60 × 3–10 mm, bases rounded or slightly clasping, margins entire, scabrous, apices acute to obtuse, faces ± copiously hirsute; distal sessile, blades oblanceolate, 15–45 × 2–3(–4.5) mm, progressively reduced distally, bases cuneate, margins entire, apices acute, white-spine-tipped, faces sparsely strigose. <b>Heads</b> in ample, leafy, paniculiform arrays, branches ascending, sometimes secund (heads often crowded). <b>Peduncles</b> hispid, bracts 1–3+, oblong-lanceolate, 3–5 mm, not grading into phyllaries. <b>Involucres</b> campanulate to hemispheric, 4–6 mm. <b>Phyllaries</b> in 3–5 series, linear-lanceolate, ± unequal to subequal, bases ± indurate, margins hyaline proximally, outer distally hispido-scabrous, green zones diamond-shaped, restricted to distal 1/2–1/4, apices (outer) spreading to reflexed, acute, subspinulose, (inner) acuminate, purplish, faces (outer) scabroso-puberulent or strigose, eglandular, inner distally stipitate-glandular. <b>Ray</b> florets 20–35; corollas azure blue to violet or lavender, laminae 5–10 × 0.6–1.2 mm. <b>Disc</b> florets 20–30+; corollas light yellow turning pinkish to purple, 3–4 mm, tubes ca. 1/2 narrowly funnelform throats, lobes triangular, 0.5–0.7 mm, glabrous. <b>Cypselae</b> dull purple or brown, obovoid, not compressed, 1.5–2 mm, 7–9-nerved, faces densely sericeous; pappi tan to tawny, sometimes rose to violet-tinged, 3.5–5.5 mm. <b>2n</b> = 10.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Oct.
|habitat=Fields, prairies, disturbed grounds
|elevation=200–400 m
|distribution=Ont.;Colo.;Conn.;Ill.;Ind.;Iowa;Ky.;Md.;Mass.;Minn.;Mo.;Nebr.;N.J.;N.Y.;N.Dak.;Pa.;R.I.;Vt.;Wash.;Wis.
|discussion=<p><i>Symphyotrichum ×amethystinum</i> is the F1 hybrid between <i>S. ericoides</i> and <i>S. novae-angliae</i>, encountered sometimes throughout the area where the two parental species co-occur. It is morphologically intermediate; it has non-spiny, sparsely stipitate-glandular phyllaries and rose-violet rays in mid-sized heads. Forma leucerythros Bemis and forma leucos Bemis have been described within this hybrid and may represent recombinants or normal population color variants.</p>
|tables=
|references=
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-->{{#Taxon:
name=Symphyotrichum ×amethystinum
|author=
|authority=(Nuttall) G. L. Nesom
|rank=species
|parent rank=subgenus
|synonyms=Virgulus ×amethystinus
|basionyms=Aster amethystinus
|family=Asteraceae
|phenology=Flowering Aug–Oct.
|habitat=Fields, prairies, disturbed grounds
|elevation=200–400 m
|distribution=Ont.;Colo.;Conn.;Ill.;Ind.;Iowa;Ky.;Md.;Mass.;Minn.;Mo.;Nebr.;N.J.;N.Y.;N.Dak.;Pa.;R.I.;Vt.;Wash.;Wis.
|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_1116.xml
|tribe=Asteraceae tribe Astereae
|genus=Symphyotrichum
|subgenus=Symphyotrichum subg. Virgulus
|species=Symphyotrichum ×amethystinum
}}<!--

-->[[Category:Treatment]][[Category:Symphyotrichum subg. Virgulus]]