Helianthus divaricatus Linnaeus (Q2753)

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

    Statements

    taxon/id/Helianthus divaricatus Linnaeus
    0 references
    Helianthus divaricatus Linnaeus
    Helianthus divaricatus
    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
    Helianthus divaricatus
    hélianthe à feuilles étalées (French)
    hélianthe divariqué (French)
    woodland sunflower (English)
    rough sunflower (English)
    divergent sunflower (English)
    Woodland sunflower (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 summer–early fall.
    Stems erect, usually glabrous, rarely ± hairy (often glaucous).
    blades (light to dark green, sometimes whitish abaxially, 3-nerved at bases) lanceolate to lanceovate, 6–15 × 1–5 cm, bases rounded to cordate, margins subentire to serrate, abaxial faces sparsely hispid to hispidulous, glanddotted.
    Peduncles 0.5–9 cm.
    Involucres hemispheric, 10–15 mm diam.
    Phyllaries 18–25, lanceolate, lance-linear, or lanceovate, 6–12 × 2–2.5 mm, (margins ciliate) apices acuminate to attenuate, abaxial faces hispidulous to glabrate, not glanddotted.
    Paleae 5–8 mm, 3-toothed (apices ciliate).
    Ray-florets 8–12;
    laminae 15–30 mm.
    Disc-florets 40+;
    corollas 4.2–5.5 mm, lobes yellow;
    anthers usually dark-brown to black, appendages yellow.
    Cypselae 3–3.6 mm, glabrate;
    pappi of 2 aristate scales 2.2–2.5 mm. 2n = 34.