View source for Prenanthes altissima

{{Treatment/ID
|accepted_name=Prenanthes altissima
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 797. 1753
|year=1753
}}
|common_names=Tall rattlesnakeroot;prenanthe élevée
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Nabalus altissimus
|authority=(Linnaeus) Hooker
|rank=species
}} {{Treatment/ID/Synonym
|name=Prenanthes altissima var. cinnamomea
|authority=Fernald
|rank=variety
}} {{Treatment/ID/Synonym
|name=Prenanthes altissima var. hispidula
|authority=Fernald
|rank=variety
}}
|hierarchy=Asteraceae;Asteraceae tribe Cichorieae;Prenanthes;Prenanthes altissima
|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 altissima]]</div></div>
|volume=Volume 19
|mention_page=page 264, 267
|treatment_page=page 266
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>40–250 cm; taproots thickened, knotty, tuberous. <b>Stems</b> erect, greenish to purplish, glabrous proximally, often tomentulose distally. <b>Leaves</b>: proximal present at flowering; petioles winged; blades usually ovate or triangular, 4–15 × 2–16 cm, thin, bases truncate to hastate or cordate, margins entire or shallowly dentate, often deeply 3-lobed, faces glabrous or with scattered hairs on veins; distal reduced in size and lobing. <b>Heads</b> in narrow or spreading, paniculiform arrays. <b>Involucres</b> cylindric, 9–14 × 2–3 mm. <b>Calyculi</b> of 4–6, blackish, triangular bractlets 1–4 mm, glabrous. <b>Phyllaries</b> (4–)5(–6), pale green, often blackish at bases and apices, linear to lanceolate, 10–12 mm, glabrous or sparsely hairy. <b>Florets</b> (4–)5(–6); corollas pale yellow to greenish yellow, 7–15 mm. <b>Cypselae</b> brown to tan, subcylindric, subterete, 4–5 mm, indistinctly 5–10-ribbed; pappi usually whitish or pale yellow, sometimes reddish brown, 5–6 mm. <b>2n</b> = 16.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Nov.
|habitat=Open deciduous hardwood or mixed woods, shaded slopes, bluffs, disturbed areas, roadsides
|elevation=50–800 m
|distribution=N.B.;N.S.;Ont.;P.E.I.;Que.;Ala.;Ark.;Conn.;Del.;Ga.;Ill.;Ind.;Ky.;La.;Maine;Md.;Mass.;Mich.;Mo.;N.H.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;W.Va.
|discussion=<p><i>Prenanthes altissima</i> is recognized by its narrow involucres with 5 pale green, glabrous phyllaries, (4–)5(–6) florets, and pale yellow to greenish yellow corollas. Pappi in this species are most commonly whitish or pale yellow. Specimens with reddish brown to orange pappi have been recognized as var. cinnamomea, found in Arkansas, Louisiana, and Missouri. Specimens with densely hairy stems and pale yellow pappi have been recognized as var. hispidula, found mostly in New York, New England, and adjacent Canada.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Prenanthes altissima
|authority=Linnaeus
|rank=species
|parent rank=genus
|synonyms=Nabalus altissimus;Prenanthes altissima var. cinnamomea;Prenanthes altissima var. hispidula
|basionyms=
|family=Asteraceae
|phenology=Flowering Aug–Nov.
|habitat=Open deciduous hardwood or mixed woods, shaded slopes, bluffs, disturbed areas, roadsides
|elevation=50–800 m
|distribution=N.B.;N.S.;Ont.;P.E.I.;Que.;Ala.;Ark.;Conn.;Del.;Ga.;Ill.;Ind.;Ky.;La.;Maine;Md.;Mass.;Mich.;Mo.;N.H.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;W.Va.
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V19_361.xml
|tribe=Asteraceae tribe Cichorieae
|genus=Prenanthes
|species=Prenanthes altissima
}}<!--

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