Xanthisma spinulosum (Pursh) D. R. Morgan & R. L. Hartman (Q2534)

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Xanthisma spinulosum is a taxon with the rank species within the genus Xanthisma
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English
Xanthisma spinulosum (Pursh) D. R. Morgan & R. L. Hartman
Xanthisma spinulosum is a taxon with the rank species within the genus Xanthisma

    Statements

    taxon/id/Xanthisma spinulosum (Pursh) D.R. Morgan & R.L. Hartman
    0 references
    Xanthisma spinulosum (Pursh) D.R. Morgan & R.L. Hartman
    Xanthisma spinulosum
    (Pursh) D.R. Morgan & R.L. Hartman
    FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 20: Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford University Press, New York.
    accepted
    (Pursh) D.R. Morgan & R.L. Hartman
    lacy tansy-aster (English)
    spiny ironplant (English)
    cut-leaved ironplant (English)
    spiny goldenweed (English)
    spiny goldenaster (English)
    haplopappe épineux (French)
    Cut-leaf ironplant (English)
    spiny goldenweed (English)
    Mexico
    Perennials or subshrubs, 10–100 cm;
    caudices branched, usually woody, taproots 2–18+ cm.
    Stems 1–30+, branched throughout or in distal 1/2–2/3, moderately stout to stout, not wiry, hairy or glabrous, often stipitate-glandular.
    Leaves: basal sometimes withering by flowering, blades 1.5–3 × 0.8–1.3 cm, pinnatifid to 2+-pinnatifid;
    cauline variously spaced, blades oblong to lanceolate, 0.2–8 × 0.1–3 cm, not reduced markedly distally, margins deeply lobed to coarsely dentate or ± entire, teeth 4–18+ per side, each tipped with white bristles 0.2–1.8 mm, hairy or glabrous, often stipitate-glandular.
    Peduncles glabrous or hairy, often stipitate-glandular;
    bracts 0–3 leaflike.
    Involucres hemispheric to cupulate, 6–10 × 8–25 mm.
    Phyllaries in 5–6 series, linear to linear-lanceolate, 0.1–0.9 mm, apices acute to acuminate, tipped with white bristle, faces glabrous or hairy, often stipitate-glandular.
    Ray-florets 14–60;
    corollas yellow, tubes 2.5–3.2 mm, laminae 5–12 × 1–2.5 mm.
    Disc-florets 30–150+;
    corollas 4–5 mm.
    Cypselae narrowly obovoid, 1.8–2.5 mm, nerves 16–24, sparsely to moderately tawny hairy;
    pappi tawny, 4–6 mm, bristles progressively longer adaxially.