Vernonia Schreber (Q3225)

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Vernonia is a taxon with the rank genus within the tribe Vernonieae
Language Label Description Also known as
English
Vernonia Schreber
Vernonia is a taxon with the rank genus within the tribe Vernonieae

    Statements

    taxon/id/Vernonia Schreber
    0 references
    Vernonia Schreber
    Vernonia
    Schreber
    FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 19: Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York.
    accepted
    Ironweed (English)
    Mainly c
    e North America
    n Mexico
    2–3 species in South America
    Leaves usually mostly cauline (rarely mostly basal or basal and cauline);
    sessile or petiolate;
    blades ovate, elliptic, lanceolate, oblanceolate, spatulate, linear, or filiform, bases usually ± cuneate (rounded-truncate in V. pulchella), margins usually toothed (rarely entire), apices acute to attenuate, abaxial faces usually ± scabrellous to strigillose or tomentose to pannose, sometimes glabrate or glabrous, usually resin-gland-dotted (sometimes ± pitted), adaxial faces ± scabrellous or glabrate, sometimes resin-gland-dotted (rarely pitted).
    Heads discoid, ± pedunculate, not subtended by foliaceous bracts, (6–) 40–100+ in ± corymbiform to paniculiform arrays (6–) 10–25+ cm diam.
    Involucres ± campanulate to obconic or hemispheric, 3–8 (–11+) mm diam.
    Phyllaries 18–70+ in 4–7+ series, the outer ovate to lanceolate or subulate, inner ± lanceolate to oblong, all ± chartaceous, margins entire, often ciliolate, tips rounded (then sometimes apiculate), or acuminate, subulate, or filiform, faces glabrous or sparsely strigillose to tomentose, sometimes ± gland-dotted.
    Florets 9–30 (–65+);
    corollas usually purplish or pink (rarely white), tubes longer than funnelform throats, lobes 5, lance-linear, ± equal.
    Cypselae ± columnar, sometimes arcuate, 8–10-ribbed, glabrous or ± strigillose to hirtellous, often resin-gland-dotted;
    pappi persistent, of 20–30+ outer, erose to subulate scales or bristles plus 20–40+ inner, longer, subulate to setiform scales or bristles.