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-undefined" data-properties=""><b>Perennials,</b> 15–120 cm. <b>Stems</b> 1–12+, erect, branched from bases, throughout, or only among heads, strigoso-hirsute, gland-dotted. <b>Leaves</b> basal and cauline; alternate; petiolate (petioles relatively shorter distally); 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 gland-dotted. <b>Heads</b> radiate, borne singly or in loose, corymbiform arrays. <b>Involucres</b> ± rotate, 8–16 mm diam. <b>Phyllaries</b> persistent, 5–15 in 2 series (usually reflexed in fruit, unequal, outer longer). <b>Receptacles</b> subspheric to columnar, paleate (paleae conduplicate, linear to oblong-oblique, chartaceous proximally, herbaceous distally, apices truncate, usually densely strigose and gland-dotted, each margin usually with an adaxial resin gland; receptacles plus paleae and florets = discs, 5–70 × 5–18 mm). <b>Ray</b> florets 3–15+, neuter; corollas yellow, bicolor (maroon/yellow), or wholly maroon. <b>Disc</b> florets 50–400+, bisexual, fertile; corollas yellowish green, often purplish distally, tubes shorter than cylindric throats, lobes 5, obovate to triangular (gland-dotted and, sometimes, hairy abaxially). <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; pappi of 1–2 toothlike projections, or coroniform, or 0. <b>x</b> = 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-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V21_134.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Rudbeckiinae
|genus=Ratibida
}}<!--

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