View source for Bidens beckii

{{Treatment/ID
|accepted_name=Bidens beckii
|accepted_authority=Torrey ex Sprengel
|publications={{Treatment/Publication
|title=Neue Entd.
|place=2: 135. 1821
|year=1821
}}
|common_names=Bident de Beck
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Megalodonta beckii
|authority=(Torrey ex Sprengel) Greene
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Coreopsidinae;Bidens;Bidens beckii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Coreopsidinae]]</div><div class="higher-taxon"><small>genus</small>[[Bidens]]</div><div class="higher-taxon"><small>species</small>[[Bidens beckii]]</div></div>
|volume=Volume 21
|mention_page=page 205, 206
|treatment_page=page 209
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials </b>(perhaps flowering first year) to 200+ cm (aquatics). <b>Leaves</b> sessile; submersed blades multifid (2–3+-pinnatisect), ultimate lobes filiform, mostly 0.1–0.3 mm diam.; aerial blades ovate to lanceolate, 10–45+ × 5–20+ mm, bases cuneate, margins pectinately incised to serrate or entire, not ciliate, apices obtuse to acuminate or attenuate, faces glabrous. <b>Heads</b> usually borne singly. <b>Peduncles</b> (10–)20–100 mm. <b>Calyculi</b> of 5–6 usually spreading, oblong to obovate bractlets 5–8 mm, margins entire, not ciliate, abaxial faces usually glabrous. <b>Involucres</b> ± hemispheric, 7–12 × 12–15 mm. <b>Phyllaries</b> 7–8+, ovate, 7–10 mm. <b>Ray</b> florets 8; laminae yellow, 10–15 mm. <b>Disc</b> florets 10–30+; corollas pale yellow, 5–6 mm. <b>Cypselae</b> (outer and inner ± alike) yellowish to greenish brown, nearly terete or weakly 4-angled, ± linear, 10–15 mm, margins not barbed or ciliate, apices truncate, faces smooth or ± striate, glabrous; pappi of 2(–6) divergent to patent, retrorsely barbed (on distal 1/4 or so) awns 13–25(–40) mm. <b>2n</b> = 26.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Sep.
|habitat=Still or slow-moving waters
|elevation=0–300+ m
|distribution=B.C.;Man.;N.B.;N.S.;Ont.;Que.;Sask.;Conn.;Idaho;Ill.;Ind.;Iowa;Maine;Mass.;Mich.;Minn.;Mo.;Mont.;N.H.;N.J.;N.Y.;Ohio;Oreg.;Pa.;R.I.;Vt.;Wash.;Wis.
|discussion=<p>M. L. Roberts (1985) presented a strong case for treating <i>Bidens beckii</i> as Megalodonta beckii.</p>
|tables=
|references={{Treatment/Reference
|id=roberts1985a
|text=Roberts, M. L. 1985. The cytology, biology and systematics of Megalodonta beckii (Compositae). Aquat. Bot. 21: 99–110.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Bidens beckii
|authority=Torrey ex Sprengel
|rank=species
|parent rank=genus
|synonyms=Megalodonta beckii
|basionyms=
|family=Asteraceae
|phenology=Flowering Jul–Sep.
|habitat=Still or slow-moving waters
|elevation=0–300+ m
|distribution=B.C.;Man.;N.B.;N.S.;Ont.;Que.;Sask.;Conn.;Idaho;Ill.;Ind.;Iowa;Maine;Mass.;Mich.;Minn.;Mo.;Mont.;N.H.;N.J.;N.Y.;Ohio;Oreg.;Pa.;R.I.;Vt.;Wash.;Wis.
|reference=roberts1985a
|publication title=Neue Entd.
|publication year=1821
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V21_506.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Coreopsidinae
|genus=Bidens
|species=Bidens beckii
}}<!--

-->[[Category:Treatment]][[Category:Bidens]]