Difference between revisions of "Bidens aristosa (Michaux) Britton (Q2556)"
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Latest revision as of 12:53, 24 June 2022
Bidens aristosa is a taxon with the rank species within the genus Bidens
| Language | Label | Description | Also known as |
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Bidens aristosa (Michaux) Britton
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Bidens aristosa is a taxon with the rank species within the genus Bidens
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taxon/id/Bidens aristosa (Michaux) Britton
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Bidens aristosa (Michaux) Britton
Bidens aristosa
(Michaux) 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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midwestern tickseed-sunflower (English)
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CA-ON
present
introduced
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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-ON
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US-AL
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US-AR
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US-DC
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US-IL
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US-IN
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US-KY
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US-LA
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US-MD
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US-MI
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US-MN
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US-MO
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US-NC
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US-SC
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US-TN
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US-TX
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US-VA
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Leaves: petioles 10–30 mm;
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blades lanceolate to lance-linear overall, 30–80 (–150) × 10–30 (–50) mm, usually laciniately pinnatisect, primary lobes 3–7+, 15–60+ × 2–20 mm, bases cuneate, ultimate margins laciniate to serrate, ciliate, apices acuminate, faces glabrous or sparsely scabrellous.
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Heads in ± corymbiform arrays.
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Peduncles (10–) 30–80+ mm.
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Calyculi of 8–12 (–16) usually spreading to reflexed, linear, seldom foliaceous bractlets (4–) 5–7 (–12) mm, margins entire, ciliate, abaxial faces glabrous or ± scabrellous.
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Involucres ± hemispheric or broader, 6–8 (–12) × 10–15 mm.
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Phyllaries 7–8 (–13), lanceovate to lance-linear, 6–8 (–12) mm.
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Ray-florets (5–) 8–10+;
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laminae yellow, 10–25 mm.
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Disc-florets (12–) 20–40+;
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corollas yellowish, 2–3+ mm.
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Cypselae redbrown to blackish, ± flattened (unequally 3–4-angled), broadly cuneate, outer (4–) 5–6 mm, inner 5–7 mm (lengths mostly 1.5–2.5 times widths), margins (± corky-winged) patently to antrorsely barbed, apices truncate to concave, faces weakly striate, sometimes tuberculate, glabrous or sparsely strigillose;
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pappi 0, or of 2 (–4) spreading to divergent, antrorsely or retrorsely barbed awns (0.5–) 2–4 (–6) mm.
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pinnatisect
usually laciniately
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