Symphyotrichum tradescantii (Linnaeus) G. L. Nesom (Q2427)
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Symphyotrichum tradescantii is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
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Symphyotrichum tradescantii (Linnaeus) G. L. Nesom
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Symphyotrichum tradescantii is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
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Statements
taxon/id/Symphyotrichum tradescantii (Linnaeus) G.L. Nesom
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Symphyotrichum tradescantii (Linnaeus) G.L. Nesom
Symphyotrichum tradescantii
(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-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.
Newfoundland, CA
present
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Herbier Marie-Victorin (MT). Université de Montréal, Montréal, QC. Specimen. http://www.biodiversite.umontreal.ca/herbier-marie-victorin?lang=en
CA-NB
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CA-NL
Nfld. and Labr. (Nfld.)
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CA-NS
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CA-QC
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US-ME
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US-MA
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US-NH
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US-NJ
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US-NY
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US-RI
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US-VT
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Stems 1–5+, ascending to erect (straight, slender, 1–2.5 (–3) mm diam.), glabrous.
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Leaves thin, margins scabrous to scabrellous or eciliate, apices mucronulate, faces glabrous;
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basal persistent or withering by flowering, petiolate (petioles slightly winged, sheathing), blades spatulate to elliptic or oblanceolate, 10–40 × 5–11 mm, bases cuneate to attenuate, margins crenate-serrate, apices obtuse to acute;
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proximal cauline persistent or withering by flowering, ± broadly winged-petiolate or sessile, blades oblong, lanceolate or elliptic-lanceolate to oblanceolate, or linear-lanceolate, 20–100 × 3–9 mm, bases attenuate to cuneate, slightly clasping, margins serrulate or entire;
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distal sessile, blades oblanceolate to linear-lanceolate or linear, 10–60 × 1–7 mm, gradually reduced distally, bases cuneate to tapering, margins serrulate or entire, apices acute to acuminate.
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Heads {(10–) 25–100} in paniculiform arrays, branches ascending (1–10 heads per branch).
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Peduncles ascending, 0.2–2.5+ cm, glabrous, bracts 1–4, subulate to linear.
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Involucres cylindro-campanulate, 3.3–4.5 (–5) mm.
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Phyllaries in 4–5 series oblong-lancoelate (outer) to linear-lanceolate (inner) or linear (innermost), unequal, bases indurate 1/2+, margins scarious, erose, hyaline, ciliolate, green zones lanceolate, apices acute to acuminate or caudate, mucronulate or apiculate, sometimes purplish, faces glabous.
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Ray-florets 14–27;
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corollas white, laminae 4.3–8.2 × 0.7–0.8 mm.
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Disc-florets 20–30;
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corollas pale-yellow becoming purplish, 3–4.1 mm, tubes shorter to nearly equaling funnelform throats, lobes lanceolate, 0.5–1 mm.
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Cypselae tan (nerves stramineous), obovoid, ± compressed, 3.5–4 mm, 4–5-nerved, faces strigillose;
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pappi white, 3–3.6 mm. 2n = 16, 32.
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spatulate
elliptic or oblanceolate
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spatulate
elliptic or oblanceolate
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spatulate
elliptic or oblanceolate
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winged-petiolate
more or less broadly
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elliptic-lanceolate
oblanceolate or linear-lanceolate
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winged-petiolate
more or less broadly
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elliptic-lanceolate
oblanceolate or linear-lanceolate
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winged-petiolate
more or less broadly
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elliptic-lanceolate
oblanceolate or linear-lanceolate
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oblanceolate
linear-lanceolate or linear
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acuminate or caudate mucronulate or apiculate
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acuminate or caudate mucronulate or apiculate
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pale-yellow becoming purplish
becoming
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