Bidens cernua Linnaeus (Q2559)
Bidens cernua is a taxon with the rank species within the genus Bidens
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Bidens cernua Linnaeus
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Bidens cernua is a taxon with the rank species within the genus Bidens
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Statements
taxon/id/Bidens cernua Linnaeus
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Bidens cernua Linnaeus
Bidens cernua
Linnaeus
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 21: Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Oxford University Press, New York.
accepted
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CA-BC
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Klinkenberg, B. (ed.). 2010+. E-Flora BC: Electronic Atlas of the Plants of British Columbia. Lab. for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver, B.C. http://www.eflora.bc.ca http://www.eflora.bc.ca/
CA-AB
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Moss, E.H. 1983. Flora of Alberta. 2nd edition, revised by J.G. Packer. University of Toronto Press, Toronto. 687 pp.
CA-SK
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Harms, V.L. 2006. Annotated catalogue of Saskatchewan vascular plants. http://www.biodiversity.sk.ca/Docs/AnnotatedCatalogueSKVascPlants2006.pdf
CA-MB
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Manitoba Checklist, 2002
CA-ON
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Newmaster, S.G. & S. Ragupathy. 2005. Flora Ontario - Integrated Botanical Information System (FOIBIS), Phase I. University of Guelph, Canada. http://www.uoguelph.ca/foibis http://www.uoguelph.ca/foibis/
CA-QC
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Marie-Victorin, Fr. 1995. Flore laurentienne. 3e éd. Mise à jour et annotée par L. Brouillet, S.G. Hay, I. Goulet, M. Blondeau, J. Cayouette et J. Labrecque. Gaétan Morin éditeur. 1093 pp.
CA-NB
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Hinds, H.R. 2000. Flora of New Brunswick : a manual for the identification of the vascular plants of New Brunswick. 2nd edition. Biology Department, University of New Brunswick, Fredericton. 699 pp.
CA-PE
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Catling, P.M., D.S. Erskine & R.B. MacLaren. 1985. The Plants of Prince Edward Island with new records, nomenclatural changes, and corrections and deletions. Agriculture Canada, Research Branch, Ottawa. Publication 1798. 272 pp.
CA-NS
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Zinck, M. 1998. Roland's Flora of Nova Scotia. Nimber Publishing & Nova Scotia Museum. Halifax, N. S. 2 vols. 1297 pp.
CA-YT
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Cody, W.J. 2000. Flora of the Yukon Territory. 2nd ed. National Research Press, Ottawa. 669 pp.
CA-NT
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Porsild, A.E. & W.J. Cody. 1980. Vascular Plants of the Continental Northwest Territories, Canada. National Museum of Natural Sciences, Ottawa, Ont. 667 pp.
CA-AB
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CA-BC
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CA-MB
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CA-NB
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CA-NT
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CA-NS
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CA-ON
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CA-PE
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CA-QC
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CA-SK
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CA-YT
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US-AL
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US-AK
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US-AZ
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US-AR
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US-CA
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US-CO
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US-CT
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US-DE
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US-DC
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US-GA
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US-ID
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US-IL
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US-IN
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US-IA
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US-KS
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US-KY
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US-LA
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US-ME
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US-MA
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US-MI
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US-MN
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US-MO
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US-MT
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US-NE
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US-NV
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US-NH
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US-NJ
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US-NM
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US-NY
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US-NC
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US-OH
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US-OK
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US-OR
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US-PA
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US-RI
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US-SD
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US-TN
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US-TX
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US-UT
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US-VT
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US-VA
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US-WA
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US-WV
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US-WI
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US-WY
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Leaves (rarely in 3s) sessile;
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blades lanceovate or oblanceolate to lanceolate or linear, 40–100 (–200+) × (2–) 5–25 (–45+) mm, bases cuneate to rounded, margins usually coarsely dentate to serrate, sometimes entire, sometimes ciliate, apices acute to acuminate, faces glabrous.
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Heads (erect or nodding at flowering, usually nodding in fruit) borne singly or in open, ± corymbiform arrays.
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Peduncles 10–40 (–100+) mm.
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Calyculi of (3–) 5–8 (–10) spreading to reflexed, oblong to lance-linear, often ± foliaceous bractlets or bracts (3–) 8–12 (–25+) mm, margins usually ciliate, abaxial faces usually glabrous, bases sometimes hispidulous.
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Involucres ± hemispheric or broader, (3–) 6–10 × (8–) 12–20+ mm.
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Phyllaries 6–8+, ovate or lanceovate to lanceolate, 2–10 mm.
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Ray-florets usually 6–8, sometimes 0;
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laminae orange-yellow, 2–15 (–18) mm.
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Disc-florets (10–) 40–100 (–150+);
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corollas orange-yellow, 3–4 mm.
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Cypselae blackish or brown, usually ± flattened, sometimes ± 4-angled, ± cuneate, outer (3–) 5–6+ mm, inner 4–8 mm, margins (± thickened or winged) retrorsely ciliate, apices ± truncate to convex, faces ± striate, glabrous or tuberculo-strigillose;
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pappi of (2–) 4, ± erect, retrorsely barbed awns (1–) 2–4 mm. 2n = 24, 48.
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oblanceolate
lanceolate or linear
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in open , more or less corymbiform arrays
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flattened
usually more or less
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4-angled
sometimes more or less
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