Symphyotrichum spathulatum (Lindley) G. L. Nesom (Q2488)

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Symphyotrichum spathulatum is a taxon with the rank species within the section Symphyotrichum sect. Occidentales
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English
Symphyotrichum spathulatum (Lindley) G. L. Nesom
Symphyotrichum spathulatum is a taxon with the rank species within the section Symphyotrichum sect. Occidentales

    Statements

    taxon/id/Symphyotrichum spathulatum (Lindley) G.L. Nesom
    0 references
    Symphyotrichum spathulatum (Lindley) G.L. Nesom
    Symphyotrichum spathulatum
    (Lindley) 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 spathulatum
    western mountain aster (English)
    aster spatulé (French)
    Western mountain aster (English)
    Stems 1–5+, ascending to erect, glabrous or sparsely puberulent.
    Leaves thin, margins entire, apices acute, faces glabrous or sparsely puberulent;
    basal persistent, petiolate, blades narrowly elliptic to obovate, 50–150 × 3–15 mm, attenuate, margins entire;
    proximal cauline sessile or subpetiolate, blades linear to narrowly elliptic, 50–150 × 2–15 mm, bases attenuate or cuneate;
    distal sessile, blades 30–60 × 2–10 mm, reduced distally, bases cuneate to rounded.
    Heads in corymbiform to paniculiform arrays, branches usually few.
    Peduncles sparsely hairy, bracts 0–3+.
    Involucres campanulate, 5–10 mm.
    Phyllaries in 3–5 series, narrowly oblong or linear (outer) to linear (inner), unequal, bases indurate, margins entire, green zones elliptic to lanceolate, apices usually acute, sometimes obtuse, faces glabrous or ± puberulent.
    Ray-florets 15–40;
    corollas violet, laminae 9–15 × 1–2 mm.
    Disc-florets 30-80 (–100);
    corollas yellow, sometimes becoming reddish, 4.5–6 mm, lobes triangular, 0.5–1 mm.
    Cypselae brown, cylindric to obovoid, not compressed, 2.5–3.5 mm, ± 4-nerved, faces hairy;
    pappi whitish, 5–7 mm.