Iva Linnaeus (Q2774)

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

    Statements

    taxon/id/Iva Linnaeus
    0 references
    Iva Linnaeus
    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
    Marsh elder (English)
    Mostly temperate North America
    some subtropical
    some in Old World
    Annuals, perennials, subshrubs, or shrubs, 10–350 cm.
    Stems usually erect, sometimes decumbent to sprawling, often freely branched.
    petiolate or sessile;
    blades (1-nerved or 3-nerved) deltate, elliptic, filiform, lanceolate, linear, obovate, ovate, spatulate, or trullate, margins entire or toothed, faces glabrous or ± scabrellous, often glanddotted.
    Heads discoid or ± disciform, in (± bracteate) racemiform or spiciform arrays (heads 1–2 in axil of each bract, bracts sometimes leaflike).
    Involucres ± hemispheric or turbinate to campanulate or urceolate, 2–10+ mm diam.
    Phyllaries persistent, 3–15+ in 1–3+ series, distinct or ± connate, all ± herbaceous or inner scarious to membranous.
    Receptacles flat or convex to hemispheric;
    paleae cuneiform or spatulate to linear or setiform, ± membranous, sometimes all or partially wanting.
    Pistillate florets usually 1–8+, rarely 0;
    corollas whitish (inconspicuous), ± tubular.
    Functionally staminate florets 3–20+;
    corollas whitish to pinkish, funnelform, lobes 5, soon reflexed (filaments ± connate, anthers coherent or distinct).
    Cypselae plumply obovoid to pyriform, often ± obcompressed, sometimes scabrellous or hispidulous distally, usually ± glanddotted;