View source for Prenanthes aspera

{{Treatment/ID
|accepted_name=Prenanthes aspera
|accepted_authority=Michaux
|publications={{Treatment/Publication
|title=Fl. Bor.-Amer.
|place=2: 83. 1803
|year=1803
}}
|common_names=Rough rattlesnakeroot
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Nabalus asper
|authority=(Michaux) Torrey & A. Gray
}}
|hierarchy=Asteraceae;Asteraceae tribe Cichorieae;Prenanthes;Prenanthes aspera
|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 aspera]]</div></div>
|volume=Volume 19
|mention_page=page 265, 269, 270
|treatment_page=page 267
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>35–170 cm; taproots fusiform, thickened, tuberous, with smaller lateral roots. <b>Stems</b> erect, green and mottled purple, glabrous proximally, midstems hispid or setose, scabrous to coarsely setose distally. <b>Leaves</b>: proximalmost usually withered by flowering; petiolate (midcauline sessile, clasping); blades spatulate, 4–11 × 2–5 cm, firm, coriaceous, brittle, bases attenuate, margins entire or weakly dentate, apices acute to obtuse, faces glabrate to roughly hispid abaxially; distal reduced. <b>Heads</b> in erect, racemiform or narrowly paniculiform arrays. <b>Involucres</b> cylindric to campanulate, 12–17 mm. <b>Calyculi</b> of 6–12, green, triangular to lanceolate bractlets 2–5 mm, coarsely setose. <b>Phyllaries</b> 6–10, yellow green to tan, linear-lanceolate, 8–15 mm, coarsely setose. <b>Florets</b> 8–19; corollas pale yellow to creamy white, 9–17 mm. <b>Cypselae</b> tan, subcylindric, subterete, 5–6 mm, irregularly 10–12-ribbed; pappi pale yellow or brown, 7–8 mm. <b>2n</b> = 16.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Oct.
|habitat=Tall-grass prairies, dry prairies, dry rocky woods
|elevation=50–600 m
|distribution=Ark.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Minn.;Miss.;Mo.;Nebr.;Ohio;Okla.;Pa.;S.Dak.;Tenn.;Wis.
|discussion=<p><i>Prenanthes aspera</i> is easily recognized by its narrow, erect habit, unlobed, spatulate, weakly dentate leaves, basal leaves withered by flowering, heads in narrow, spiciform arrays, and densely setose phyllaries. The distribution closely matches that of the tall grass prairie, and like undisturbed prairies, this species is now rare or endangered in some states.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Prenanthes aspera
|author=
|authority=Michaux
|rank=species
|parent rank=genus
|synonyms=Nabalus asper
|basionyms=
|family=Asteraceae
|phenology=Flowering Aug–Oct.
|habitat=Tall-grass prairies, dry prairies, dry rocky woods
|elevation=50–600 m
|distribution=Ark.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Minn.;Miss.;Mo.;Nebr.;Ohio;Okla.;Pa.;S.Dak.;Tenn.;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/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V19_362.xml
|tribe=Asteraceae tribe Cichorieae
|genus=Prenanthes
|species=Prenanthes aspera
}}<!--

-->[[Category:Treatment]][[Category:Prenanthes]]