View source for Rudbeckia hirta

{{Treatment/ID
|accepted_name=Rudbeckia hirta
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 907. 1753
|year=1753
}}
|common_names=Black-eyed Susan
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Rudbeckiinae;Rudbeckia;Rudbeckia sect. Rudbeckia;Rudbeckia hirta
|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>[[Rudbeckia]]</div><div class="higher-taxon"><small>section</small>[[Rudbeckia sect. Rudbeckia]]</div><div class="higher-taxon"><small>species</small>[[Rudbeckia hirta]]</div></div>
|volume=Volume 21
|mention_page=page 44, 53
|treatment_page=page 57
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> biennials, or perennials, to 100 cm (taprooted or roots fibrous). <b>Stems</b> hispid to hirsute (hairs spreading, 1+ mm). <b>Leaves</b>: blades elliptic, lanceolate, or ovate (not lobed), bases attenuate to cuneate, margins entire or serrate, apices acute, faces hispid to hirsute; basal petiolate, blades 8–30 × 0.5–7 cm; cauline petiolate or sessile, blades (sometimes pandurate) 3–20 × 0.4–4 cm. <b>Heads</b> borne singly or (2–5) in loose, corymbiform arrays. <b>Phyllaries</b> to 3 cm (faces hispid to hirsute). <b>Receptacles</b> hemispheric to ovoid; paleae 4–6 mm, apices acute, often attenuate, abaxial tips hirsute to hispid. <b>Ray</b> florets 8–16; laminae (usually uniformly yellow to yellow-orange or with a basal maroon splotch, sometimes mostly maroon) elliptic to oblong or oblanceolate, 15–45 × 5–10 mm, abaxially hispid to hirsute. <b>Discs</b> 12–22 × 10–20 mm. <b>Disc</b> florets 250–500+; corollas proximally yellowish green, distally brown-purple, 3–4.2 mm; style branches ca. 1.5 mm, apices subulate. <b>Cypselae</b> 1.5–2.7 mm; pappi 0.</span><!--

-->{{Treatment/Body
|distribution=Alta.;B.C.;Man.;N.B.;N.S.;Nfld. and Labr. (Nfld.);Ont.;P.E.I.;Que.;Sask.;Ala.;Ark.;Calif.;Colo.;Conn.;D.C.;Del.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Mass.;Md.;Mich.;Minn.;Miss.;Mo.;N.C.;N.Dak.;N.H.;N.J.;N.Mex.;N.Y.;Nebr.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Va.;Vt.;W.Va.;Wash.;Wis.;Wyo.
|discussion=<p>Varieties 4 (4 in the flora).</p><!--
--><p>Some strains of <i>Rudbeckia hirta</i> are cultivated and/or used in seed mixes for “re-naturalization” and erosion control.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Annuals, biennials, or perennials; stems branched at bases or proximal to or at or near mid heights, leafy mostly toward bases (leaves smaller distally); peduncles usually at least 1/2 plant heights (Gulf Coastal Plain, Florida to Texas)
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Biennials or perennials; stems branched mostly beyond mid heights, leafy ± throughout; peduncles to 1/3 plant heights
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Stems branched mostly at or near mid heights; basal leaves oblanceolate, faces hispid to ± sericeous; Georgia to Texas
|[[Rudbeckia hirta var. angustifolia|Rudbeckia hirta var. angustifolia]]
|-id=key-0-2
|2
|Stems branched at or near bases (plants often scapiform); basal leaves obovate to nearly orbiculate, faces scabrous to hirsute; c, s Florida
|[[Rudbeckia hirta var. floridana|Rudbeckia hirta var. floridana]]
|-id=key-0-3
|3
|Leaves: basal blades broadly ovate to broadly elliptic, 2.5–7 cm wide (lengths mostly 2 times widths), margins coarsely toothed; cauline (sometimes sessile) lanceolate, ovate, or pandurate (mostly Appalachian Highlands toIllinois)
|[[Rudbeckia hirta var. hirta|Rudbeckia hirta var. hirta]]
|-id=key-0-3
|3
|Leaves: basal blades lanceolate to oblanceolate, 1–2.5(–5) cm wide (lengths 3–5 times widths), margins entire or serrulate; cauline blades spatulate, oblanceolate, or broadly linear
|[[Rudbeckia hirta var. pulcherrima|Rudbeckia hirta var. pulcherrima]]
|}
</div></div><!--

-->{{#Taxon:
name=Rudbeckia hirta
|authority=Linnaeus
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Asteraceae
|distribution=Alta.;B.C.;Man.;N.B.;N.S.;Nfld. and Labr. (Nfld.);Ont.;P.E.I.;Que.;Sask.;Ala.;Ark.;Calif.;Colo.;Conn.;D.C.;Del.;Fla.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Mass.;Md.;Mich.;Minn.;Miss.;Mo.;N.C.;N.Dak.;N.H.;N.J.;N.Mex.;N.Y.;Nebr.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Va.;Vt.;W.Va.;Wash.;Wis.;Wyo.
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V21_122.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Rudbeckiinae
|genus=Rudbeckia
|section=Rudbeckia sect. Rudbeckia
|species=Rudbeckia hirta
}}<!--

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[[Category:Treatment]]
[[Category:Rudbeckia sect. Rudbeckia]]
[[Category:Revision Pending]]