Symphyotrichum subg. Astropolium (Nuttall) Semple in J. C. Semple et al. (Q2518)

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Symphyotrichum subg. Astropolium is a taxon with the rank subgenus within the genus Symphyotrichum
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English
Symphyotrichum subg. Astropolium (Nuttall) Semple in J. C. Semple et al.
Symphyotrichum subg. Astropolium is a taxon with the rank subgenus within the genus Symphyotrichum

    Statements

    taxon/id/Symphyotrichum subg. Astropolium (Nuttall) J.C. Semple
    0 references
    Symphyotrichum subg. Astropolium (Nuttall) J.C. Semple
    Symphyotrichum subg. Astropolium
    (Nuttall) J.C. Semple
    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 subg. Astropolium
    North America
    worldwide
    Stems not brittle at maturity, glabrous or glabrate, sometimes sparsely hairy in leaf-axils.
    Leaves: basal withering by flowering, petiolate, blades 1-nerved, spatulate to ovate or obovate, margins entire or shallowly serrate or crenate;
    cauline subpetiolate or sessile, blades narrowly lanceolate, linear, or subulate, bases attenuate, slightly sheathing, or ± clasping.
    Ray-florets 10–30 (–54) in 1 series;
    laminae (1.3–) 5–8.5 (–9.5) × (0.2–) 1.2–2 mm.
    Disc corollas sometimes weakly ampliate, throats funnelform, lobes ± erect or ± spreading.