Symphyotrichum robynsianum (J. Rousseau) Brouillet & Labrecque (Q2425)

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Symphyotrichum robynsianum is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum
Language Label Description Also known as
English
Symphyotrichum robynsianum (J. Rousseau) Brouillet & Labrecque
Symphyotrichum robynsianum is a taxon with the rank species within the section Symphyotrichum sect. Symphyotrichum

    Statements

    taxon/id/Symphyotrichum robynsianum (J. Rousseau) Brouillet & Labrecque
    0 references
    Symphyotrichum robynsianum (J. Rousseau) Brouillet & Labrecque
    Symphyotrichum robynsianum
    (J. Rousseau) Brouillet & Labrecque
    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 robynsianum
    (J. Rousseau) Brouillet & Labrecque
    aster de Robyns (French)
    Robyns' aster (English)
    Robyns’s aster (English)
    aster à longues feuilles (English)
    1 reference
    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. http://www.efloras.org/volume_page.aspx?volume_id=1020&flora_id=1
    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
    Centre de données sur le patrimoine naturel du Québec. 2008. Les plantes vasculaires menacées ou vulnérables du Québec. 3e éd. gouvernement du Québec, ministère du Développement durable, de l'Environnement et des Parcs, Direction du patrimoine écologique et des parcs, Québec. 180 p. http://www.cdpnq.gouv.qc.ca/pdf/PMV_Qc_07072008.pdf
    Flowering Aug–Sep.
    gravelly
    rocky grounds
    calcareous
    cracks
    rocky stream
    lake shores
    limestone alvars
    glades
    swales
    jackpine outwash plains
    Stems 1, erect (± flexuous, often reddish), glabrous, hairy in lines distally.
    Leaves stiff, margins sparsely serrulate or entire, ± revolute, scabrous, apices acute to acuminate, mucronulate, faces glabrous, sometimes midveins hairy;
    basal withering by flowering, long-petiolate, petioles narrowly winged, bases sheathing, blades lanceolate, ca. 20 × 3–5 mm, slightly attenuate to narrowly cuneate;
    proximal cauline withering by flowering, sessile or subpetiolate, blades linear-lanceolate to oblanceolate, 100–200 × 4–8 mm, bases cuneate to attenuate, clasping;
    distal sessile, blades linear-lanceolate to linear, 10–110 × 1–7 mm, progressively reduced distally, bases cuneate to rounded, slightly clasping or not, margins entire.
    Heads in elongate, open, narrow, paniculiform or racemiform arrays, branches ascending, short, leafy, branch leaves smaller and reduced distally (heads 1–3 per branch).
    Peduncles glabrous or ± densely pilose in lines, bracts 1–4, linear, sometimes inrolled distally, clasping, ciliate, distal 1–2 often subtending and surpassing involucres.
    Involucres campanulate, 5–8.5 mm.
    Phyllaries in 3–4 series, oblong-lanceolate, subequal, bases indurate 1/3–3/4, margins scarious, erose, hyaline, ciliate proximally, sparsely ciliolate distally, green zones lanceolate to linear, sometimes outer ± foliaceous, apices acuminate to long-acuminate, often foliaceous, mucronate to apiculate, faces glabrous, eglandular.
    Ray-florets 20–35;
    corollas dark blue-violet, seldom white, laminae 8–13 × 1–1.5 mm.
    Disc-florets (18–) 23–40;
    corollas yellow, 4–6.5 mm, tubes shorter than funnelform throats, lobes lanceolate, 0.8–1 mm.
    Cypselae tan, obovoid, compressed, ca. 2.2–2.4 mm, 5–6-nerved, faces sparsely strigillose;
    pappi pinkish, 7–8 mm. 2n = 64, 80.