Ambrosia chamissonis (Lessing) Greene (Q2721)

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Ambrosia chamissonis is a taxon with the rank species within the genus Ambrosia
Language Label Description Also known as
English
Ambrosia chamissonis (Lessing) Greene
Ambrosia chamissonis is a taxon with the rank species within the genus Ambrosia

    Statements

    taxon/id/Ambrosia chamissonis (Lessing) Greene
    0 references
    Ambrosia chamissonis (Lessing) Greene
    Ambrosia chamissonis
    (Lessing) Greene
    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
    herbe à poux de Chamisso (French)
    silver burrweed (English)
    silver burr ragweed (English)
    1 reference
    Douglas, G.W., G.B. Straley, D.V. Meidinger & J. Pojar. 1998. Illustrated Flora of British Columbia. B.C. Ministry of Environment, Lands & Parks and B.C. Ministry of Forests. Victoria. Crown Publications. 8 vols.
    Mexico (Baja California)
    Flowering Apr–Nov.
    Stems prostrate or decumbent.
    Leaves mostly alternate;
    petioles 15–30 (–45+) mm;
    blades rounded-deltate to ovate or obovate, 20–45 (–70+) × 10–25 (–50+) mm overall, not lobed or 1–2 (–3) -pinnately lobed, bases cuneate, ultimate margins entire or toothed, abaxial and adaxial faces strigillose to sericeous.
    Pistillate heads clustered, proximal to staminates;
    Staminate heads: peduncles 0.5–2 mm;
    involucres shallowly cupshaped, 4–6+ mm diam., strigillose;
    florets 8–25 (–50).
    Burs: bodies fusiform to ± pyriform, 4–7+ mm, ± strigillose to pilosulous, spines 8–16+, scattered, stoutly conic or flattened to triquetrous-subulate, 0.5–1.5+ mm, tips straight.