View source for Prenanthella

{{Treatment/ID
|accepted_name=Prenanthella
|accepted_authority=Rydberg
|publications={{Treatment/Publication
|title=Bull. Torrey Bot. Club
|place=33: 160. 1906
|year=1906
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Cichorieae;Prenanthella
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Cichorieae]]</div><div class="higher-taxon"><small>genus</small>[[Prenanthella]]</div></div>
|etymology=Genus Prenanthes and Latin - ella, diminutive, alluding to original assignment of type species
|volume=Volume 19
|mention_page=page 219, 360, 370
|treatment_page=page 359
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> 5–30 cm; taprooted. <b>Stems</b> 1–5+, erect (leafy proximally, often flexuous distally), branched near base bases or distally, glandular-puberulent to glabrescent. <b>Leaves</b> basal or proximally cauline; sessile or petiolate; blades spatulate to oblanceolate, often runcinate, margins irregularly dentate to lobed, teeth often spinulose (faces glabrous). <b>Heads</b> (10–150+, on flexuous, bracteate, intricately-branched axes) in paniculiform arrays. <b>Peduncles</b> not inflated, minutely bracteate. <b>Calyculi</b> of 2–3, minute, deltate, unequal bractlets. <b>Involucres</b> ovoid, cylindric at flowering, 2–3 mm diam. <b>Phyllaries</b> 3–5 in 1 series, linear-lanceolate, equal, herbaceous, margins hyaline, apices acute. <b>Receptacles</b> flat, smooth (with scars), glabrous, epaleate. <b>Florets</b> 3–4; corollas pink or white (slightly surpassing phyllaries at flowering). <b>Cypselae</b> pale brown, columnar, tapering slightly proximally, not beaked, 5-ribbed and grooved, minutely rugulose, glabrous; pappi tardily falling, of 80+, basally connate, white, unequal, stiff, smooth bristles. <b>x</b> = 7.</span><!--

-->{{Treatment/Body
|distribution=sw United States;nw Mexico.
|discussion=<p>Species 1.</p><!--
--><p>The single species of <i>Prenanthella</i> was usually assigned to <i>Lygodesmia</i> in treatments prior to A. S. Tomb’s (1972b) reassessment. Its base chromosome number of x = 7 was taken as evidence of a possible relationship with <i>Malacothrix</i>, <i>Calycoseris</i>, and <i>Anisocoma</i>, also x = 7 (Tomb 1974). Recent molecular phylogenetic studies (J. Lee et al. 2003) place <i>Prenanthella</i> in a clade with <i>Pleiacanthus</i>, <i>Stephanomeria</i>, and <i>Rafinesquia</i>, all with x = 8. This group, together with <i>Munzothamnus</i>, constitutes the subtribe Stephanomeriinae of Lee and B. G. Baldwin (2004).</p>
|tables=
|references={{Treatment/Reference
|id=tomb1972a
|text=Tomb, A. S. 1972b. Re-establishment of the genus Prenanthella Rydb. (Compositae: Cichorieae). Brittonia 24: 223–228.
}}
}}<!--

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-->{{#Taxon:
name=Prenanthella
|author=Kenton L. Chambers
|authority=Rydberg
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Asteraceae
|illustrator=Yevonn Wilson-Ramsey
|distribution=sw United States;nw Mexico.
|reference=tomb1972a
|publication title=Bull. Torrey Bot. Club
|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/V19_570.xml
|tribe=Asteraceae tribe Cichorieae
|genus=Prenanthella
}}<!--

-->[[Category:Treatment]][[Category:Asteraceae tribe Cichorieae]]