View source for Prenanthes crepidinea

{{Treatment/ID
|accepted_name=Prenanthes crepidinea
|accepted_authority=Michaux
|publications={{Treatment/Publication
|title=Fl. Bor.-Amer.
|place=2: 84. 1803
|year=1803
}}
|common_names=Nodding rattlesnakeroot
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Nabalus crepidineus
|authority=(Michaux) de Candolle
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Cichorieae;Prenanthes;Prenanthes crepidinea
|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>[[Prenanthes]]</div><div class="higher-taxon"><small>species</small>[[Prenanthes crepidinea]]</div></div>
|volume=Volume 19
|mention_page=page 265, 269, 271
|treatment_page=page 268
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>100–300 cm; taproots fusiform, thick and tuberous. <b>Stems</b> erect, green to tan, glabrous proximally, tomentose distally. <b>Leaves</b>: proximal present at flowering; petiolate (petioles winged, 1–13 cm, margins sometimes serrate); blades deltate to broadly ovate, 8–23 × 3–14 cm, coriaceous, bases hastate or sagittate, margins entire or coarsely dentate to serrate (teeth often large and remote), faces glabrous or scabrous, hirsute along veins; distal petiolate or sessile, ovate or elliptic, entire. <b>Heads</b> in broad, open, (leafy) paniculiform arrays (branches often elongate, nodding). <b>Calyculi</b> of 18–20 dark green, triangular to lanceolate bractlets 2–5 mm, coarsely setose. <b>Involucres</b> campanulate, 12–16 × 7–14 mm. <b>Phyllaries</b> 9–15, dark green to blackish, lanceolate to elliptic, 10–16 mm, margins scarious, moderately to densely, ± coarsely setose on midribs. <b>Florets</b> 15–38; corollas usually white, sometimes yellow, 9–15 mm. <b>Cypselae</b> golden brown, oblong to linear, subterete to angled, 5–6 mm, unequally 10–12-ribbed; pappi tan, 6–8 mm. <b>2n</b> = 32</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Sep.
|habitat=Moist, rich, deciduous woods, lowland or upland woods, thickets, low prairies, wet areas in rich soil
|elevation=300. 1200 m
|distribution=Ark.;Del.;Ill.;Ind.;Iowa;Ky.;Mich.;Minn.;Mo.;N.Y.;Ohio;Pa.;Tenn.;W.Va.;Wis.
|discussion=<p><i>Prenanthes crepidinea</i> is generally recognized by its tall and robust habit, large deltate or ovate proximal leaves, coarsely dentate margins with relatively large, remote teeth, heads borne in open, paniculiform arrays, dark green or blackish and moderately to densely setose phyllaries, and white or yellow corollas. In some areas <i>P. crepidinea</i> and <i>P. serpentaria</i> overlap in leaf morphology and corolla color, perhaps indicative of past hybridization, and can be difficult to distinguish. <i>Prenanthes serpentaria</i> is generally smaller in stature, has more elongate, pinnately lobed leaves with rounded sinuses, more sparsely setose phyllaries, and yellow or greenish yellow corollas. <i>Prenanthes crepidinea</i> appears to favor moist, bottomland sites, in contrast to the drier and acidic upland habitats preferred by <i>P. serpentaria</i>. <i>Prenanthes crepidinea</i> appears to hybridize with <i>P. aspera</i> in southeastern Missouri (J. A. Steyermark 1963).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Prenanthes crepidinea
|authority=Michaux
|rank=species
|parent rank=genus
|synonyms=Nabalus crepidineus
|basionyms=
|family=Asteraceae
|phenology=Flowering Aug–Sep.
|habitat=Moist, rich, deciduous woods, lowland or upland woods, thickets, low prairies, wet areas in rich soil
|elevation=300. 1200 m
|distribution=Ark.;Del.;Ill.;Ind.;Iowa;Ky.;Mich.;Minn.;Mo.;N.Y.;Ohio;Pa.;Tenn.;W.Va.;Wis.
|reference=None
|publication title=Fl. Bor.-Amer.
|publication year=1803
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V19_367.xml
|tribe=Asteraceae tribe Cichorieae
|genus=Prenanthes
|species=Prenanthes crepidinea
}}<!--

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