Ambrosia pumila (Nutt.) A.Gray


Cite taxon page as 'WFO (2021): Ambrosia pumila (Nutt.) A.Gray. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000038062. Accessed on: 26 Oct 2021'

General Information

Perennials, 10–20(–40+) cm. Stems erect. Leaves mostly alternate (sometimes crowded at bases of stems); petioles 5–35(–55) mm; blades deltate to elliptic, 15–35(–75) × 12–25(–45) mm overall, laciniately (1–)2(–3)-pinnately lobed, bases cuneate to truncate, ultimate margins entire, abaxial and adaxial faces ± strigillose to sericeous (often grayish) and gland-dotted. Pistillate heads clustered, proximal to staminates; florets 1. Staminate heads: peduncles 0.5–6 mm; involucres obliquely cup-shaped, 3–5 mm diam., ± strigillose; florets 8–25+. Burs: bodies ± fusiform, 2–2.5 mm, strigillose, spines or tubercles 0 or 1–5, mostly distal, stoutly conic, 0.1–0.5 mm, tips straight. 2n = 72.

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

     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).