View source for Prenanthes alata

{{Treatment/ID
|accepted_name=Prenanthes alata
|accepted_authority=(Hooker) D. Dietrich
|publications={{Treatment/Publication
|title=Syn. Pl.
|place=4: 1309. 1847
|year=1847
}}
|common_names=Western or wing-leaved rattlesnakeroot;white or western white lettuce
|basionyms={{Treatment/ID/Basionym
|name=Nabalus alatus
|authority=Hooker
|publication_title=Fl. Bor.-Amer.
|publication_place=1: 294, plate 102. 1833
}} {{Treatment/ID/Basionym
|name=Sonchus hastatus
|authority=Lessing
|publication_title=Linnaea
|publication_place=6: 99. 1831,
}}
|synonyms={{Treatment/ID/Synonym
|name=Prenanthes lessingii
|authority=Hultén
}}
|hierarchy=Asteraceae;Asteraceae tribe Cichorieae;Prenanthes;Prenanthes alata
|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 alata]]</div></div>
|volume=Volume 19
|mention_page=page 265, 268, 270
|treatment_page=page 266
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>15–80 cm; taproots slender to thickened, tuberous. <b>Stems</b> 1(–10), erect or ascending, green to purple, usually simple, glabrous or glabrate proximally, tomentulose distally. <b>Leaves</b>: proximal present at flowering; petioles winged (2–6 cm); blades triangular to irregularly elliptic, 3–25 × 1–7 cm, thin or slightly coriaceous, bases abruptly constricted, truncate to slightly hastate, margins irregularly dentate or coarsely serrate, apices acute to acuminate, faces glabrate; distal sessile, ovate to lanceolate, reduced. <b>Heads</b> (10–17) in broad, corymbiform arrays, lateral branches often elongate and overtopping main stems. <b>Involucres</b> narrowly campanulate, 10–13 × 5–6 mm. <b>Calyculi</b> of 2–3, dark green, lanceolate or subulate bractlets 1–3 mm, glabrous or finely tomentulose. <b>Phyllaries</b> 8, green to dark green, lanceolate, 8–11 mm, margins scarious, apices acute, finely tomentulose. <b>Florets</b> 7–16; corollas white to purplish, 9–16 mm. <b>Cypselae</b> brown to light tan, subcylindric, 4–7 mm, weakly 7–10-ribbed; pappi pale yellow to dull white, 8–10 mm. <b>2n</b> = 16.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Sep.
|habitat=Stream banks, mountain springs, seeps, cliffs near shore, moist shady places
|elevation=0–1500 m
|distribution=Alta.;B.C.;Alaska;Idaho;Mont.;Oreg.;Wash.
|discussion=<p><i>Prenanthes alata</i> is recognized by its relatively small size, elongate and winged petioles, triangular-hastate leaf blades, heads in broad corymbiform arrays, and dark green, finely tomentulose phyllaries.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Prenanthes alata
|author=
|authority=(Hooker) D. Dietrich
|rank=species
|parent rank=genus
|synonyms=Prenanthes lessingii
|basionyms=Nabalus alatus;Sonchus hastatus
|family=Asteraceae
|phenology=Flowering Jun–Sep.
|habitat=Stream banks, mountain springs, seeps, cliffs near shore, moist shady places
|elevation=0–1500 m
|distribution=Alta.;B.C.;Alaska;Idaho;Mont.;Oreg.;Wash.
|reference=None
|publication title=Syn. Pl.
|publication year=1847
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V19_359.xml
|tribe=Asteraceae tribe Cichorieae
|genus=Prenanthes
|species=Prenanthes alata
}}<!--

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