View source for Taraxacum trigonolobum

{{Treatment/ID
|accepted_name=Taraxacum trigonolobum
|accepted_authority=Dahlstedt
|publications={{Treatment/Publication
|title=Ark. Bot.
|place=20A(1): 8, fig. 5. 1926
|year=1926
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Cichorieae;Taraxacum;Taraxacum trigonolobum
|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>[[Taraxacum]]</div><div class="higher-taxon"><small>species</small>[[Taraxacum trigonolobum]]</div></div>
|volume=Volume 19
|mention_page=page 242, 248
|treatment_page=page 249
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>8–41(–56.5 in fruit) cm; taproots seldom branched. <b>Stems</b> 1–5, ascending to erect, purplish, glabrous or glabrescent proximally, ± densely villous distally. <b>Leaves</b> fewer than 10, horizontal or patent to ± erect; petioles widely winged; blades oblanceolate-obovate (largest in distal 1/5) to oblanceolate (often runcinate, particularly early leaves), (3.5–)6–29.5 × (1.3–)2.1–5.5 cm, bases cuneate to attenuate, margins sometimes lobed proximally or ± regularly and deeply, usually ± strongly toothed proximally (less so on distal 1/2–1/5), lobes retrorse to straight or antrorse, triangular to deltate, ± acuminate, teeth mostly proximal, rarely on distal 1/4–1/5 or terminal lobes, small to coarse, irregular (1–5 on lobes), apices rounded or truncate to obtuse, rarely acute, apiculate, faces glabrous or glabrate (very sparsely pilose, mainly on midveins). <b>Calyculi</b> 14–20, appressed (to spreading), often pale green, ovate to elliptic-ovate bractlets in 2–3 series, 5–8 × 2.8–4.5 mm, margins narrowly white, scarious (occasionally outer ± ciliate), apices acuminate to caudate, some strongly horned, tips dark-scarious. <b>Involucres</b> dark green, ± glaucous, broadly campanulate, 15–20 mm. <b>Phyllaries</b> 14–20 in 2 series, lanceolate, 2.1–2.8 mm wide, margins ± narrowly scarious (wider proximally, or not in outer series), apices strongly horned, tips purplish with dark center, scarious, ± erose. <b>Florets</b> 120–150; corollas yellow, outer grayish-purplish striped abaxially, 19–25 × 1.3–2.3 mm. <b>Cypselae</b> brown to reddish brown, bodies oblanceoloid, 3–3.5 mm, cones conic, 0.8–1 mm, beaks slender, 7.5–10 mm, ribs 4–5 prominent (to 15 fine), faces proximally smooth (faintly tuberculate), muricate in distal 1/4; pappi yellowish or cream to white, 7–8 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer.
|habitat=Herbaceous vegetation, lakeshores, moist banks, alluvial shores, moist meadows, moist heaths, grassy cliff tops
|elevation=0–600 m
|distribution=Alaska;Russian Far East (Kamchatka).
|discussion=<p><i>Taraxacum trigonolobum</i> is known only from the Aleutian Islands and islands of the Bering Sea, on the American side. It is probably the taxonomically weakest entity that I am recognizing in this complex, but its distribution and leaf morphology, among other attributes, are distinctive enough for recognition at the present time.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Taraxacum trigonolobum
|author=
|authority=Dahlstedt
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering summer.
|habitat=Herbaceous vegetation, lakeshores, moist banks, alluvial shores, moist meadows, moist heaths, grassy cliff tops
|elevation=0–600 m
|distribution=Alaska;Russian Far East (Kamchatka).
|reference=None
|publication title=Ark. Bot.
|publication year=1926
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V19_326.xml
|tribe=Asteraceae tribe Cichorieae
|genus=Taraxacum
|species=Taraxacum trigonolobum
}}<!--

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