Helianthella Torrey & A. Gray (Q2746)

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Helianthella is a taxon with the rank genus within the tribe Heliantheae
Language Label Description Also known as
English
Helianthella Torrey & A. Gray
Helianthella is a taxon with the rank genus within the tribe Heliantheae

    Statements

    taxon/id/Helianthella Torrey & A. Gray
    0 references
    Helianthella Torrey & A. Gray
    Helianthella
    Torrey & A. Gray
    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
    Little sunflower (English)
    w North America
    n Mexico
    Stems erect, usually branched.
    usually petiolate (at least proximal);
    blades (usually 3-nerved or 5-nerved from at or near bases) elliptic, lanceolate, lance-linear, linear, oblanceolate, ovate, ovatelanceolate, or spatulate, bases mostly cuneate, margins entire, faces glabrous or hairy.
    Heads radiate, borne singly or (2–15+) in corymbiform arrays.
    Involucres campanulate to hemispheric or broader, 10–50 mm diam.
    Phyllaries persistent, 22–32+ in ± 3 series (mostly deltate-ovate or ovate to lanceolate, linear, or oblong, subequal or unequal, outer sometimes foliaceous).
    Receptacles ± convex, paleate (paleae falling with cypselae, conduplicate, scarious or chartaceous).
    Ray-florets 8–21, neuter;
    corollas ± yellow.
    Disc-florets 30–200+, bisexual, fertile;
    corollas yellow or purple to brown, tubes shorter than or equaling throats, lobes 5, deltate (abaxially hairy).
    Cypselae (brownish) ± compressed, obovate to obcordate (margins usually ± winged, usually ± ciliate, faces glabrous or strigose);
    pappi 0, or persistent, of 2 ± subulate scales plus 0–4+ shorter, lacerate scales (sometimes all ± connate).