View source for Prenanthes barbata

{{Treatment/ID
|accepted_name=Prenanthes barbata
|accepted_authority=(Torrey & A. Gray) Milstead ex Cronquist
|publications={{Treatment/Publication
|title=Brittonia
|place=29: 223. 1977
|year=1977
}}
|common_names=Barbed rattlesnakeroot
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Nabalus fraseri var. barbatus
|authority=Torrey & A. Gray
|rank=variety
|publication_title=Fl. N. Amer.
|publication_place=2: 481. 1843
}}
|synonyms={{Treatment/ID/Synonym
|name=Prenanthes serpentaria var. barbata
|authority=(Torrey & A. Gray) A. Gray
|rank=variety
}}
|hierarchy=Asteraceae;Asteraceae tribe Cichorieae;Prenanthes;Prenanthes barbata
|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 barbata]]</div></div>
|volume=Volume 19
|mention_page=page 265, 268
|treatment_page=page 267
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>50–150 cm; taproots thickened, tuberous, with lateral side roots. <b>Stems</b> erect, purplish, glabrous proximally, finely tomentulose or setose distally. <b>Leaves</b>: proximal withered by flowering; petiolate (petioles 2–3 cm, winged); blades ± elliptic, 4–10 × 1–4 cm, coriaceous, bases narrowed (not hastate), margins coarsely and irregularly dentate or serrate (unlobed), apices acute, faces glabrous or papillose-hispid; mid cauline cuneate or sessile and clasping; distal sessile and reduced. <b>Heads</b> (15–50) in (much-branched) paniculiform or thyrsiform arrays (nodding). <b>Calyculi</b> of 7–11, dark green to purple, triangular to lance-ovate bractlets 2–5 mm, hispid or setose along midveins. <b>Involucres</b> cylindric to campanulate, 12–16 × 4–6 mm. <b>Phyllaries</b> 6–8, usually purple or lavender, subulate to lanceolate, 11–14 mm, margins scarious, coarsely hispid or setose along midveins. <b>Florets</b> 10–15; corollas white to yellowish white, 13–16 mm. <b>Cypselae</b> tan, subcylindric, subterete to 5-angled, 8–10 mm, indistinctly 8–10-ribbed; pappi yellowish white, 7–8 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Oct.
|habitat=Sandy oak-hickory-pine woods, savannas, prairies, pine barrens
|elevation=10–100 m
|distribution=Ala.;Ark.;Ga.;Ky.;La.;Okla.;Tenn.;Tex.
|discussion=<p><i>Prenanthes barbata</i> is identified by its erect habit, irregularly dentate leaves, heads with 6–8 purple phyllaries, coarsely setose calyculi and phyllaries, and white to yellowish white corollas.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Prenanthes barbata
|authority=(Torrey & A. Gray) Milstead ex Cronquist
|rank=species
|parent rank=genus
|synonyms=Prenanthes serpentaria var. barbata
|basionyms=Nabalus fraseri var. barbatus
|family=Asteraceae
|phenology=Flowering Aug–Oct.
|habitat=Sandy oak-hickory-pine woods, savannas, prairies, pine barrens
|elevation=10–100 m
|distribution=Ala.;Ark.;Ga.;Ky.;La.;Okla.;Tenn.;Tex.
|reference=None
|publication title=Brittonia
|publication year=1977
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V19_364.xml
|tribe=Asteraceae tribe Cichorieae
|genus=Prenanthes
|species=Prenanthes barbata
}}<!--

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