View source for Ratibida

{{Treatment/ID
|accepted_name=Ratibida
|accepted_authority=Rafinesque
|publications={{Treatment/Publication
|title=Fl. Ludov.,
|place=73. 1817
|year=1817
}}
|common_names=Prairie coneflower;Mexican-hat
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Rudbeckiinae;Ratibida
|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 Rudbeckiinae]]</div><div class="higher-taxon"><small>genus</small>[[Ratibida]]</div></div>
|etymology=Derivation unknown
|volume=Volume 21
|mention_page=page 43
|treatment_page=page 60
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole-organism some measurement;whole-organism duration"><b>Perennials,</b> 15–120 cm.</span> <span class="statement" id="st-d0_s1" data-properties="stem quantity;stem orientation;stem architecture;stem pubescence"><b>Stems </b>1–12+, erect, branched from bases, throughout, or only among heads, strigoso-hirsute, glanddotted.</span> <span class="statement" id="st-d0_s2" data-properties=""><b>Leaves </b>basal and cauline;</span> <span class="statement" id="st-d0_s3" data-properties="">alternate;</span> <span class="statement" id="st-d0_s4" data-properties="leaf position;leaf position;leaf arrangement;leaf architecture">petiolate (petioles relatively shorter distally);</span> <span class="statement" id="st-d0_s5" data-properties="blade shape;blade shape;ultimate margin architecture or shape;ultimate margin architecture or shape;face pubescence">blades lanceolate to ovate or oblanceolate to obovate or oblong, pinnately lobed to 1–2-pinnatifid (lobes usually rounded), ultimate margins entire or serrate, faces usually strigoso-hirsute, usually glanddotted.</span> <span class="statement" id="st-d0_s6" data-properties="head architecture or arrangement;head arrangement;head arrangement;array architecture or fragility;array architecture"><b>Heads </b>radiate, borne singly or in loose, corymbiform arrays.</span> <span class="statement" id="st-d0_s7" data-properties="involucre shape;involucre diameter"><b>Involucres </b>± rotate, 8–16 mm diam.</span> <span class="statement" id="st-d0_s8" data-properties="phyllary duration;phyllary quantity;series quantity"><b>Phyllaries </b>persistent, 5–15 in 2 series (usually reflexed in fruit, unequal, outer longer).</span> <span class="statement" id="st-d0_s9" data-properties="receptacle shape;receptacle architecture"><b>Receptacles </b>subspheric to columnar, paleate (paleae conduplicate, linear to oblong-oblique, chartaceous proximally, herbaceous distally, apices truncate, usually densely strigose and glanddotted, each margin usually with an adaxial resin-gland; receptacles plus paleae and florets = discs, 5–70 × 5–18 mm).</span> <span class="statement" id="st-d0_s10" data-properties="ray-floret quantity;ray-floret architecture"><b>Ray-</b>florets 3–15+, neuter;</span> <span class="statement" id="st-d0_s11" data-properties="corolla coloration;corolla coloration;corolla coloration;corolla coloration;corolla coloration">corollas yellow, bicolor (maroon/yellow), or wholly maroon.</span> <span class="statement" id="st-d0_s12" data-properties="disc-floret quantity;disc-floret reproduction;disc-floret reproduction"><b>Disc-</b>florets 50–400+, bisexual, fertile;</span> <span class="statement" id="st-d0_s13" data-properties="corolla coloration;corolla coloration;tube height or length or size;throat shape;lobe quantity;lobe shape">corollas yellowish green, often purplish distally, tubes shorter than cylindric throats, lobes 5, obovate to triangular (glanddotted and, sometimes, hairy abaxially).</span> <span class="statement" id="st-d0_s14" data-properties="cypsela shape;cypsela shape;margin shape;margin shape;apex architecture or shape;apex architecture or pubescence or shape;face pubescence;face pubescence"><b>Cypselae </b>(black) strongly compressed, linear-oblanceolate to oblong-oblique, margins (at least abaxial) usually ciliate or pectinate-fimbriate, apices truncate and, often, ciliate, faces glabrous or sparsely hairy;</span> <span class="statement" id="st-d0_s15" data-properties="projection quantity;projection shape">pappi of 1–2 toothlike projections, or coroniform, or 0.</span> <span class="statement" id="st-d0_s16" data-properties="pappus shape;pappus presence;x chromosome quantity">x = 16.</span><!--

-->{{Treatment/Body
|distribution=North America;Mexico
|discussion=<p>Species 7 (4 in flora).</p>
|tables=
|references={{Treatment/Reference
|id=jackson1963a
|text=Jackson, S. W. 1963. Hybridization among three species of Ratibida. Univ. Kansas Sci. Bull. 44: 3–27.
}}{{Treatment/Reference
|id=richards1968a
|text=Richards, E. L. 1968. A monograph of the genus Ratibida. Rhodora 70: 348–393.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Plants taprooted; leaves 2-pinnately lobed; peduncles to 6.5 cm (ribs not prominent; heads held just beyond leaves); discs subspheric to ovoid, 5–15 mm; pappi coroniform (of connatescales 0.2–1.5 mm)
|[[Ratibida tagetes|Ratibida tagetes]]
|-id=key-0-1
|1
|Plants fibrous rooted or taprooted; leaves 1–2-pinnatifid or -pinnately lobed; peduncles (1.5–)6.5–48+ cm (ribs tan; heads held well beyond leaves); discs columnar, ellipsoid-globular, or ovoid, 10–70 mm; pappi 0, or of 1–2 toothlike projections
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Plants fibrous rooted; discs ellipsoid to globular or ovoid, 10–25 mm; pappi 0, or of 1–2 toothlike projections
|[[Ratibida pinnata|Ratibida pinnata]]
|-id=key-0-2
|2
|Plants taprooted; discs columnar, 10–70 mm; pappi usually of 1–2 toothlike projections, sometimes 0
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Style branches ca. 1.8 mm, proximal 1/2 stigmatic, apices subulate; cypselae: abaxial margins narrowly winged to fimbriate or pectinate-fimbriate, adaxial margins pectinate-fimbriate
|[[Ratibida peduncularis|Ratibida peduncularis]]
|-id=key-0-3
|3
|Style branches 1–2.5 mm, proximal 2/3–3/4 stigmatic, apices rounded; cypselae: abaxial margins glabrous, adaxial margins glabrous or ciliate
|[[Ratibida columnifera|Ratibida columnifera]]
|}
</div></div><!--

-->{{#Taxon:
name=Ratibida
|author=Lowell E. Urbatsch;Patricia B. Cox
|authority=Rafinesque
|rank=genus
|parent rank=subtribe
|synonyms=
|basionyms=
|family=Asteraceae
|distribution=North America;Mexico
|reference=jackson1963a;richards1968a
|publication title=Fl. Ludov.,
|publication year=1817
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21_134.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Rudbeckiinae
|genus=Ratibida
|apex architecture or pubescence or shape=ciliate
|apex architecture or shape=truncate
|array architecture=corymbiform
|array architecture or fragility=loose
|blade shape=lanceolate;ovate or oblanceolate
|corolla coloration=purplish;yellowish green;maroon;bicolor;maroon;bicolor;yellow
|cypsela shape=linear-oblanceolate;oblong-oblique
|disc-floret quantity=50;400
|disc-floret reproduction=fertile;bisexual
|face pubescence=hairy;glabrous;strigoso-hirsute
|head architecture or arrangement=radiate
|head arrangement=in loose , corymbiform arrays;singly
|involucre diameter=8mm;16mm
|involucre shape=rotate
|leaf architecture=petiolate
|leaf arrangement=alternate
|leaf position=cauline;basal
|lobe quantity=5
|lobe shape=obovate;triangular
|margin shape=pectinate-fimbriate;ciliate
|pappus presence=absent
|pappus shape=coroniform
|phyllary duration=persistent
|phyllary quantity=5;15
|projection quantity=1;2
|projection shape=toothlike
|ray-floret architecture=neuter
|ray-floret quantity=3;15
|receptacle architecture=paleate
|receptacle shape=subspheric;columnar
|series quantity=2
|stem architecture=branched
|stem orientation=erect
|stem pubescence=strigoso-hirsute
|stem quantity=1;12
|throat shape=cylindric
|tube height or length or size=shorter
|ultimate margin architecture or shape=serrate;entire
|whole-organism duration=perennial
|whole-organism some measurement=15cm;120cm
|x chromosome quantity=16
}}<!--

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