Xanthisma spinulosum (Pursh) D.R.Morgan & R.L.Hartm.
  • Sida 20(4): 1406. 2003 [22 Dec 2003]


Cite taxon page as 'WFO (2020): Xanthisma spinulosum (Pursh) D.R.Morgan & R.L.Hartm. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000036538. Accessed on: 05 Jun 2020'

General Information

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.

  • Provided by: [B].Flora of North America @ efloras.org
    • Source: [
    • 1
    • ]. 

    Synonyms

     Information From

    Compositae
    CC0 1.0 Universal (CC0 1.0). https://creativecommons.org/publicdomain/zero/1.0
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).