Symphyotrichum cordifolium (Linnaeus) G. L. Nesom (Q2419)
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Symphyotrichum cordifolium is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
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Symphyotrichum cordifolium (Linnaeus) G. L. Nesom
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Symphyotrichum cordifolium is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
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Statements
taxon/id/Symphyotrichum cordifolium (Linnaeus) G.L. Nesom
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Symphyotrichum cordifolium (Linnaeus) G.L. Nesom
Symphyotrichum cordifolium
(Linnaeus) G.L. Nesom
FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 20: Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford University Press, New York.
accepted
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CA-BC
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Lomer, F. 2000. Ephemeral introductions of vascular plants around Vancouver, British Columbia (part 2). Botanical Electronic News 270. http://www.ou.edu/cas/botany-micro/ben/ben270.html
CA-MB
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Manitoba Checklist, 2002
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-ON
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Newmaster, S.G., A. Lehela, M.J. Oldham, P.W.C. Uhlig & S. McMurray. 1998. Ontario Plant List. Ontario Forest Research Institute, Sault Ste. Marie, Ontario. Forest Information Paper No. 123. 550 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-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-MB
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CA-NB
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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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US-AL
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US-AR
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US-CT
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US-DC
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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-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-MO
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US-NE
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US-NH
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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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branched rhizomatous, or with branched caudices, becoming ± woody.
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Stems 1–5+, erect (straight to ± flexuous distally, often reddish, sometimes brown), usually glabrous, sometimes ± pilose, particularly distally.
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Leaves thin, margins serrate (often sharply, teeth acuminate, mucronulate) to serrate-crenate or subentire, strigose, apices acuminate to acute, mucronulate, abaxial faces glabrous or sparsely to densely strigose-pilose, often pilose on midveins, sometimes on other veins also, adaxial glabrous or sparsely to densely strigose, sometimes ± scabrous;
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basal withering by flowering, new vernal rosettes often present, long-petiolate (petioles ± narrowly winged, bases dilated, sheathing, ciliate), blades ovate to elliptic or suborbiculate, (10–) 35–150 × (10–) 25–75 mm, bases usually deeply cordate, sometimes rounded, margins coarsely, often irregularly serrate, apices sometimes obtuse or rounded;
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proximal cauline often withering by flowering, winged-petiolate (becoming shorter and more widely winged distally, petiole bases clasping), blades widely to narrowly ovate, 40–100 (–140) × 20–40 (–70) mm, reduced distally, bases ± deeply cordate to rounded, margins sharply serrate, apices acuminate;
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distal usually sessile or subsessile, rarely short-petiolate, blades ovate to lanceolate, 5–105 × 2–45 mm, bases cordate or rounded to attenuate or cuneate, margins serrate or entire (distalmost), apices acuminate.
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Heads [(5–) 20–300+] in ± densely paniculiform arrays, branches divaricate to ascending, paniculiform, sometimes ± long-arching, leafy.
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Peduncles 0.3–2 cm, ± pilose, bracts linear-oblanceolate or lanceolate to linear, foliaceous, distally grading into phyllaries, margins sparsely ciliolate, glabrous.
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Involucres cylindro-campanulate to cylindric, (3–) 4.5–5 (–6) mm.
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Phyllaries in (3–) 4–6 series, linear-lanceolate to oblong-lanceolate, unequal, bases indurate 1/2–3/4, margins scarious, erose, hyaline, sparsely ciliolate, green zones lanceolate to ± diamond-shaped, apical, apices (often red-tipped) acute to obtuse-acuminate or acuminate, mucronulate, faces glabrous or sparsely strigillose.
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Ray-florets (8–) 10–16 (–20);
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corollas usually blue to purple, seldom whitish or pink, laminae (5–) 6–8 (–10) × 1.4–1.8 mm.
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Disc-florets (8–) 10–15 (–20);
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corollas cream-color or light yellow becoming purple, (3–) 4–4.5 (–5) mm, tubes slightly shorter than funnelform throats, lobes sometimes ± spreading, narrowly triangular to lanceolate, 0.6–0.9 mm.
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Cypselae dull purple or light-brown, obovoid, ± compressed, 2–2.5 mm, 4–5-nerved, faces glabrous;
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pappi white or ± rose-tinged, 2.5–4.5 mm. 2n = 16, 32.
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pilose
sometimes more or less
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serrate
serrate-crenate or subentire
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glabrous or
sparsely densely strigose-pilose
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glabrous or
sparsely densely strigose
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scabrous
sometimes more or less
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elliptic or suborbiculate
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long-arching
sometimes more or less
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usually blue
purple seldom whitish or pink
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usually blue
purple seldom whitish or pink
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light yellow becoming purple
becoming
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