View source for Marshallia

{{Treatment/ID
|accepted_name=Marshallia
|accepted_authority=Schreber
|publications={{Treatment/Publication
|title=Gen. Pl.
|place=2: 810. 1791
|year=1791
}}
|common_names=Barbara’s buttons
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Marshalliinae;Marshallia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Marshalliinae]]</div><div class="higher-taxon"><small>genus</small>[[Marshallia]]</div></div>
|etymology=For Moses Marshall, 1758–1813, American botanist, nephew of and assistant to Humphrey Marshall
|volume=Volume 21
|mention_page=
|treatment_page=page 456
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> (10–)20–80(–120) cm (fibrous-rooted, usually with caudices, sometimes rhizomatous). <b>Stems</b> erect, sometimes branched (striate). <b>Leaves</b> basal and/or cauline; alternate; petiolate or sessile; blades (1- or 3-nerved) elliptic, linear, linear-elliptic, linear-oblanceolate, oblanceolate, ovate, or spatulate, margins entire, faces glabrous. <b>Heads</b> discoid, borne singly or in open, corymbiform arrays (peduncles relatively long). <b>Involucres</b> hemispheric to obconic, 10–25+ mm diam. <b>Phyllaries</b> persistent, 12–24 in ± 2 series (lanceolate, linear, oblong, ovate, or rhombic, subequal, herbaceous, midnerves often keeled, proximal margins often scarious). <b>Receptacles</b> conic or convex (usually hollow), paleate (paleae linear to spatulate, distally herbaceous). <b>Ray</b> florets 0. <b>Disc</b> florets (20–)45–90(–160+), bisexual, fertile; corollas pale lavender, pink, or purple, or white, (usually hairy) tubes longer than to nearly equaling throats, lobes 5, lance-linear to linear-oblong (often contorted). <b>Cypselae</b> turbinate or clavate (5-angled, ribs 10, often hairy); pappi persistent, of 5(–6) scarious to membranous (hyaline, sometimes scaberulous) scales. <b>x</b> = 9.</span><!--

-->{{Treatment/Body
|distribution=s;c;se United States.
|discussion=<p>Species 7 (7 in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=channell1957a
|text=Channell, R. B. 1957. A revision of the genus Marshallia (Compositae). Contr. Gray Herb. 81: 41–132.
}}{{Treatment/Reference
|id=watson1990a
|text=Watson, L. E. and J. R. Estes. 1990. Biosystematic and phenetic analysis of Marshallia (Asteraceae). Syst. Bot. 15: 403–414.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaves lance-elliptic, lance-linear, linear, or oblanceolate (lengths mostly 13–30 times widths), widths mostly 2–13 mm
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Leaves elliptic, lanceolate, oblanceolate, ovate, or spatulate (lengths mostly 3–13 widths), widths 8–33 mm
|[[#key-0-4| > 4]]
|-id=key-0-2
|2
|Corollas usually pale lavender to purple, rarely white; flowering Aug–Sep
|[[Marshallia graminifolia|Marshallia graminifolia]]
|-id=key-0-2
|2
|Corollas usually white, sometimes pale lavender; flowering May–Jun
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Heads 4–10, 10–25 mm diam
|[[Marshallia ramosa|Marshallia ramosa]]
|-id=key-0-3
|3
|Heads borne singly, 20–32 mm diam
|[[Marshallia caespitosa|Marshallia caespitosa]]
|-id=key-0-4
|4
|Leaves mostly cauline, blades ovate
|[[Marshallia trinervia|Marshallia trinervia]]
|-id=key-0-4
|4
|Leaves mostly basal, blades elliptic, lanceolate, oblanceolate, or spatulate
|[[#key-0-5| > 5]]
|-id=key-0-5
|5
|Phyllary apices obtuse; corollas white
|[[Marshallia obovata|Marshallia obovata]]
|-id=key-0-5
|5
|Phyllary apices acute; corollas pink
|[[#key-0-6| > 6]]
|-id=key-0-6
|6
|Heads 1(–2), 26–45 mm diam
|[[Marshallia grandiflora|Marshallia grandiflora]]
|-id=key-0-6
|6
|Heads 2–5(–10), 22–37 mm diam
|[[Marshallia mohrii|Marshallia mohrii]]
|}
</div></div><!--

-->{{#Taxon:
name=Marshallia
|author=Linda E. Watson
|authority=Schreber
|rank=genus
|parent rank=subtribe
|synonyms=
|basionyms=
|family=Asteraceae
|distribution=s;c;se United States.
|reference=channell1957a;watson1990a
|publication title=Gen. Pl.
|publication year=1791
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_1146.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Marshalliinae
|genus=Marshallia
}}<!--

-->[[Category:Treatment]][[Category:Asteraceae (tribe Heliantheae) subtribe Marshalliinae]]