View source for Bidens amplissima

{{Treatment/ID
|accepted_name=Bidens amplissima
|accepted_authority=Greene
|publications={{Treatment/Publication
|title=Pittonia
|place=4: 268. 1901
|year=1901
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Bidens cernua var. elata
|authority=Torrey & A. Gray
}} {{Treatment/ID/Synonym
|name=Bidens elata
|authority=(Torrey & A. Gray) Sherff
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Coreopsidinae;Bidens;Bidens amplissima
|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 amplissima]]</div></div>
|volume=Volume 21
|mention_page=page 208
|treatment_page=page 216
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> (30–)50–120 cm. <b>Leaves</b> sessile or petioles 10–50 mm (winged); blades lance-elliptic to lance-oblong, 80–120(–250) × 30–100 mm (proximal usually with 1–2 lobes near bases), bases cuneate, margins laciniate to serrate, ciliate, apices acuminate, faces glabrous. <b>Heads</b> in ± corymbiform arrays. <b>Peduncles</b> (10–)30–70+ mm. <b>Calyculi</b> of 8–10 usually spreading, lance-linear to lanceolate, sometimes ± foliaceous bractlets or bracts 10–20(–75) mm, margins entire or incised, ciliate, abaxial faces ± hispid at bases. <b>Involucres</b> ± hemispheric or broader, 6–10 × 18–25 mm. <b>Phyllaries</b> 13–16+, oblong to lance-ovate, 6–10 mm. <b>Ray</b> florets 6–11; laminae yellow, 4–8 mm. <b>Disc</b> florets 50–100+; corollas yellow, 2.5–3.5 mm. <b>Cypselae</b> olivaceous green, ± flattened, unequally 3–4-angled, cuneate, outer 5–6 mm, inner 6–7 mm, margins antrorsely to retrorsely barbed, apices truncate to concave, faces weakly striate, glabrous or sparsely puberulent; pappi 0, or of (1–)3(–4) suberect, retrorsely barbed awns 2–4 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Oct.
|habitat=Seasonal wetlands, borders of ponds, lakes, streams, estuaries
|elevation=0–100 m
|distribution=B.C.;Wash.
|discussion=<p>Of conservation concern.</p><!--
--><p>For decades, <i>Bidens amplissima</i> was known only from Vancouver Island; it is now known from southwestern British Columbia and northwestern Washington (F. R. Ganders et al. 2003). Occurrences in southern Manitoba and northwestern Nebraska may represent ephemeral introductions. The restricted natural range of <i>B. amplissima</i> has stimulated interest in it, the addition of it to rare plant lists, and the consideration of need for protected sites where it grows.</p>
|tables=
|references={{Treatment/Reference
|id=ganders2003a
|text=Ganders, F. R., B. Klinkenberg, and R. Klinkenberg. 2003. Taxonomy in conservation: The enigmatic Vancouver Island beggarticks. Davidsonia 14: 63–70.
}}
}}<!--

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-->{{#Taxon:
name=Bidens amplissima
|author=
|authority=Greene
|rank=species
|parent rank=genus
|synonyms=Bidens cernua var. elata;Bidens elata
|basionyms=
|family=Asteraceae
|phenology=Flowering Aug–Oct.
|habitat=Seasonal wetlands, borders of ponds, lakes, streams, estuaries
|elevation=0–100 m
|distribution=B.C.;Wash.
|reference=ganders2003a
|publication title=Pittonia
|publication year=1901
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_525.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Coreopsidinae
|genus=Bidens
|species=Bidens amplissima
}}<!--

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