Helianthus strumosus Linnaeus (Q2759)

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Helianthus strumosus is a taxon with the rank species within the genus Helianthus
Language Label Description Also known as
English
Helianthus strumosus Linnaeus
Helianthus strumosus is a taxon with the rank species within the genus Helianthus

    Statements

    taxon/id/Helianthus strumosus Linnaeus
    0 references
    Helianthus strumosus Linnaeus
    Helianthus strumosus
    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
    hélianthe scrofuleux (French)
    hélianthe strumosus (French)
    pale-leaved sunflower (English)
    pale-leaved woodland sunflower (English)
    rough sunflower (English)
    rough-leaved sunflower (English)
    Rough sunflower (English)
    hélianthe scrofuleux (English)
    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
    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 late summer–fall.
    Stems erect, glabrous or glabrate.
    mostly opposite, sometimes alternate (distal);
    petioles 1–3 cm;
    blades (light to dark green, 3-nerved distal to bases) lanceolate to lanceovate or ovate, 7–18 × 2–10 cm, bases subcordate to ± cuneate, margins entire to ± serrate, abaxial faces glabrous or tomentulose, usually densely glanddotted.
    Peduncles 1–9 cm.
    Involucres cylindric to hemispheric, 8–20 mm diam.
    Phyllaries 18–25 (erect, loose, or squarrose), lanceolate, 5.5–10 × 1.5–3 mm (equaling or slightly surpassing discs), (margins usually ciliate) apices acute to acuminate, abaxial faces glabrous or hispidulous, usually not glanddotted.
    Paleae 5.3–6.5 mm, 3-toothed.
    Ray-florets 10–20;
    laminae ca. 12–20 (–30) mm.
    Disc-florets 35+;
    corollas 5.5–6.5 mm, lobes yellow;
    anthers dark, appendages dark or reddish-brown.
    Cypselae 4–5.5 mm, glabrate;
    pappi of 2 aristate scales (1–) 2–2.5 mm. 2n = 68, 102.