View source for Symphyotrichum subg. Ascendentes

{{Treatment/ID
|accepted_name=Symphyotrichum subg. Ascendentes
|accepted_authority=(Rydberg) Semple
|publications={{Treatment/Publication
|title=in J. C. Semple et al., Cult. Native Asters Ontario,
|place=133. 2002
|year=2002
}}
|basionyms={{Treatment/ID/Basionym
|name=Ascendentes
|authority=Rydberg
|rank=unranked
|publication_title=Fl. Colorado,
|publication_place=352, 354. 1906
}}
|synonyms={{Treatment/ID/Synonym
|name=Symphyotrichum sect. Ascendentes
|authority=(Rydberg) G. L. Nesom
|rank=section
}} {{Treatment/ID/Synonym
|name=Undefined subg. Virgulaster
|authority=Semple
|rank=subgenus
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Ascendentes
|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. Ascendentes]]</div></div>
|volume=Volume 20
|mention_page=page 466, 467
|treatment_page=page 537
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> eglandular; rhizomatous. <b>Stems</b> not brittle at maturity, densely and uniformly strigose, especially distally. <b>Leaves</b>: basal persistent to, or withering by, flowering, petiolate, blades 1-nerved, oblanceolate, margins entire; cauline sessile or subpetiolate, blades linear, oblong, or obovate, bases attenuate or cuneate. <b>Phyllaries</b> usually unequal, sometimes subequal, green zones obovate to oblanceolate or elliptic (apices sometimes foliaceous, outer rarely wholly foliaceous). <b>Rays</b> florets (10–)14–60 in 1 series, laminae 8–13(–15) × 1–1.5(–2) mm. <b>Disc</b> corollas ± ampliate, throats funnelform, lobes erect. <b>Cypselae</b> cylindric to obovoid, not compressed, 4–7-nerved, glabrous. <b>x</b> = 13, 18, 21.</span><!--

-->{{Treatment/Body
|distribution=w North America.
|discussion=<p>Species 2 (2 in the flora).</p><!--
--><p>G. A. Allen (1985, 1986) demonstrated the hybrid origin of the allopolyploid <i>Symphyotrichum ascendens</i> and <i>S. defoliatum</i> from members of subg. <i>Symphyotrichum </i>sect.<i> Occidentales</i> and subg. Virgulus sect. Ericoidi; a separate subgenus was erected to accommodate these inter-subgeneric allopolyploids. In 1986, Allen also identified populations with the chromosome number 2n = 42 (x = 21) in the Mount Pinos area, southern Kern and northern Ventura counties, California. These populations resulted from a cross between <i>S. ascendens</i> and <i>S. spathulatum</i>, giving rise to an allopolyploid that, though an incipient species, lacks sufficient morphologic distinction from <i>S. ascendens</i> or <i>S. spathulatum</i> to allow separate recognition. <i>Aster</i> subg. Ascendentes (Rydberg) Semple is an illegitimate name.</p>
|tables=
|references={{Treatment/Reference
|id=allen1985a
|text=. Allen, G. A. 1985. The hybrid origin of Aster ascendens (Asteraceae). Amer. J. Bot. 72: 268–277.
}}{{Treatment/Reference
|id=allen1986a
|text=Allen, G. A. 1986. Amphidiploid origin of two endemic races of Aster (Asteraceae) in southern California. Amer. J. Bot. 73: 330–335.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Symphyotrichum subg. Ascendentes
|authority=(Rydberg) Semple
|rank=subgenus
|parent rank=genus
|synonyms=Symphyotrichum sect. Ascendentes;Undefined subg. Virgulaster
|basionyms=Ascendentes
|family=Asteraceae
|distribution=w North America.
|reference=allen1985a;allen1986a
|publication title=in J. C. Semple et al., Cult. Native Asters Ontario,
|publication year=2002
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1200.xml
|tribe=Asteraceae tribe Astereae
|genus=Symphyotrichum
|subgenus=Symphyotrichum subg. Ascendentes
}}<!--

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