Silphium perfoliatum Linnaeus (Q2799)

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Silphium perfoliatum is a taxon with the rank species within the genus Silphium
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English
Silphium perfoliatum Linnaeus
Silphium perfoliatum is a taxon with the rank species within the genus Silphium

    Statements

    taxon/id/Silphium perfoliatum Linnaeus
    0 references
    Silphium perfoliatum Linnaeus
    Silphium perfoliatum
    Linnaeus
    FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 21: Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Oxford University Press, New York.
    accepted
    silphium perfolié (French)
    cup plant (English)
    cup rosinweed (English)
    silphe perfolié (French)
    Cup plant (English)
    Stems square, glabrous, hispid, or scabrous.
    Leaves: basal caducous;
    cauline usually opposite, rarely whorled (in 3s), petiolate or sessile;
    blades deltate, lanceolate, or ovate, 2–41 × 0.5–24 cm, bases attenuate or truncate (distal connate-perfoliate), margins entire, dentate, or bidentate, apices acuminate to acute, faces scabrous to hispid.
    Phyllaries 25–37 in 2–3 series, outer appressed, apices acute to acuminate, abaxial faces scabrous or hispid.
    Ray-florets 17–35;
    Disc-florets 85–150 (–200);
    Cypselae 8–12 × 5–9 mm;
    pappi 0.5–1.5 mm.