Wyethia Nuttall (Q2805)

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Wyethia is a taxon with the rank genus within the tribe Heliantheae
Language Label Description Also known as
English
Wyethia Nuttall
Wyethia is a taxon with the rank genus within the tribe Heliantheae

    Statements

    taxon/id/Wyethia Nuttall
    0 references
    Wyethia Nuttall
    Wyethia
    Nuttall
    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
    Mules-ears (English)
    w North America
    Stems erect (or bending erect from bases), branched mostly from bases.
    usually petiolate (basal), sometimes sessile;
    blades (usually pinnately nerved, basal larger than cauline) ± deltate, elliptic-ovate, lanceolate, lance-elliptic, lance-linear, or oblong-ovate, bases truncate to cuneate, margins usually entire, rarely dentate to serrate (sometimes ciliate), faces glabrous or hairy (sometimes glanddotted or finely stipitate-glandular).
    Heads radiate, borne singly or 2–5 (–8+) in ± corymbiform to racemiform arrays.
    Involucres hemispheric to campanulate or turbinate, 12–60+ mm diam.
    Phyllaries persistent, 12–36 (–48) in 2–3+ series (subequal to unequal, outer sometimes foliaceous, much larger than inner).
    Receptacles flat to convex, paleate (paleae conduplicate, at least bases, papery).
    Ray-florets 5–25+, pistillate, fertile;
    corollas mostly yellow (cream to white in W. helianthoides).
    Disc-florets 35–150+, bisexual, fertile;
    corollas yellow, tubes much shorter than cylindric throats;
    lobes 5, ± deltate to lanceolate (style-branches stigmatic in 2 barely distinct lines, appendages ± filiform).
    Cypselae ± prismatic, weakly 3–4-angled (faces glabrous or hairy);
    pappi 0, or persistent, coroniform (usually lacerate) or of 1–4+ ovate to subulate, erose to lacerate (often basally connate) scales.