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
Language Label Description Also known as
English
Symphyotrichum cordifolium (Linnaeus) G. L. Nesom
Symphyotrichum cordifolium is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum

    Statements

    taxon/id/Symphyotrichum cordifolium (Linnaeus) G.L. Nesom
    0 references
    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
    Symphyotrichum cordifolium
    aster à feuilles cordées (French)
    heart-leaved aster (English)
    common blue wood aster (English)
    Heartleaf or common blue wood aster (English)
    aster cordifolié (English)
    1 reference
    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
    1 reference
    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.
    1 reference
    Zinck, M. 1998. Roland's Flora of Nova Scotia. Nimber Publishing & Nova Scotia Museum. Halifax, N. S. 2 vols. 1297 pp.
    1 reference
    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.
    1 reference
    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.
    1 reference
    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.
    Flowering Aug–Oct.
    rocky to loamy soils
    wooded slopes
    bluffs
    stream banks
    moist ledges
    swampy woods
    border
    beech-maple
    oak-hickory forets
    clearings
    thickets
    roadsides
    ditches
    urban areas
    branched rhizomatous, or with branched caudices, becoming ± woody.
    Stems 1–5+, erect (straight to ± flexuous distally, often reddish, sometimes brown), usually glabrous, sometimes ± pilose, particularly distally.
    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;
    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;
    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;
    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.
    Heads [(5–) 20–300+] in ± densely paniculiform arrays, branches divaricate to ascending, paniculiform, sometimes ± long-arching, leafy.
    Peduncles 0.3–2 cm, ± pilose, bracts linear-oblanceolate or lanceolate to linear, foliaceous, distally grading into phyllaries, margins sparsely ciliolate, glabrous.
    Involucres cylindro-campanulate to cylindric, (3–) 4.5–5 (–6) mm.
    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.
    Ray-florets (8–) 10–16 (–20);
    corollas usually blue to purple, seldom whitish or pink, laminae (5–) 6–8 (–10) × 1.4–1.8 mm.
    Disc-florets (8–) 10–15 (–20);
    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.
    Cypselae dull purple or light-brown, obovoid, ± compressed, 2–2.5 mm, 4–5-nerved, faces glabrous;
    pappi white or ± rose-tinged, 2.5–4.5 mm. 2n = 16, 32.