Bidens discoidea (Torrey & A. Gray) Britton (Q2561)
Bidens discoidea is a taxon with the rank species within the genus Bidens
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Bidens discoidea (Torrey & A. Gray) Britton
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Bidens discoidea is a taxon with the rank species within the genus Bidens
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taxon/id/Bidens discoidea (Torrey & A. Gray) Britton
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Bidens discoidea (Torrey & A. Gray) Britton
Bidens discoidea
(Torrey & A. Gray) Britton
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-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-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-NB
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CA-NS
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CA-ON
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CA-QC
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US-AL
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US-AR
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US-CT
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US-DE
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US-DC
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US-FL
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US-GA
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US-IL
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US-IN
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US-IA
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US-KY
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US-LA
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US-ME
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US-MD
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US-MA
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US-MI
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US-MN
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US-MS
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US-MO
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US-NH
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US-NJ
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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-PA
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US-RI
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US-SC
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US-TN
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US-TX
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US-VT
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US-VA
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US-WV
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US-WI
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10–300 m
10 meter
300 meter
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Leaves: petioles 10–40 (–60) mm;
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blades deltate to lanceovate overall, 30–80 (–100+) × 10–30 (–80+) mm, usually 3-foliolate, leaflets petiolulate, lanceovate to lanceolate, (10–) 20–50 (–100) × 5–20 (–40) mm, bases cuneate, ultimate margins usually serrate, sometimes ciliate, apices acuminate to attenuate, faces glabrous or hirtellous.
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Heads usually borne singly, sometimes in 2s or 3s.
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Peduncles 10–20 (–50+) mm.
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Calyculi of (3–) 4 (–5+) ± appressed, spatulate to linear, seldom foliaceous bractlets or bracts (3–) 12–25 mm, margins seldom ciliate, abaxial faces usually glabrous.
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Involucres ± hemispheric, 4–5 (–7) × 4–6 (–9) mm.
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Phyllaries 5–7, oblong to lanceolate, 4–6+ mm.
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Disc-florets (10–) 15–20+;
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corollas ± orange, 1.5–2 mm.
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Cypselae blackish to redbrown or stramineous, ± flattened, linear to narrowly cuneate, outer 3–5 mm, inner 4–6+ mm, margins not distinctly ciliate, apices ± truncate to concave, faces ± tuberculate, antrorsely strigillose;
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pappi of 2 ± erect, antrorsely barbed or smooth awns (0.2–) 1–2.4 mm. 2n = 24.
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barbed
of 2 more or less erect; antrorsely
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blackish
redbrown or stramineous
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