Helianthus hirsutus Rafinesque (Q2756)

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

    Statements

    taxon/id/Helianthus hirsutus Rafinesque
    0 references
    Helianthus hirsutus Rafinesque
    Helianthus hirsutus
    Rafinesque
    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 hérissé (French)
    hairy sunflower (English)
    whiskered sunflower (English)
    stiff-haired sunflower (English)
    rough sunflower (English)
    Hairy 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.
    Mexico (Coahuila)
    Mexico (Nuevo León)
    Flowering late summer–fall.
    open sites
    woodland edges
    roadsides
    Stems erect, hirsute.
    petioles 0.4–2 cm;
    blades (3-nerved from bases) lanceolate to ovate, 6.5–18 × 1–8 cm, bases truncate to broadly rounded or cuneate, margins subentire to serrate (flat), abaxial faces ± hirsute, glanddotted (adaxial not glanddotted).
    Peduncles 1–5 cm.
    Involucres hemispheric, 10–25 mm diam.
    Phyllaries 18–25 (usually loose, spreading, not reflexed), lanceolate, 7–12 × 2.5–3.5 mm, (margins ciliate) apices acute to short-acuminate, abaxial faces not glanddotted.
    Paleae 7–10 mm, 3-toothed (apices yellowish, hairy).
    Ray-florets 10–15;
    laminae 15–20 mm.
    Disc-florets 40+;
    corollas 5.5–6.5 mm, lobes yellow;
    anthers dark-brown or black, appendages dark or yellowish.
    Cypselae 4–4.5 mm, glabrate or distally puberulent;
    pappi of 2 aristate scales 2.5–3.2 mm. 2n = 68.