Erigeron canadensis L.
  • Sp. Pl.: 863 (1753)


Cite taxon page as 'WFO (2021): Erigeron canadensis L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000015917. Accessed on: 05 Dec 2021'

General Information

Herbs, annual, 50-100 cm tall or more; root fusiform, fibrous rooted. Stems erect, sparsely hirsute, branched above, densely leafy. Leaves: basal withered at anthesis, lower petiolate, oblanceolate, [2-]6-10 × [0.4-]1-1.5 cm, surfaces or only adaxial sparsely pilose, base attenuate, margin sparsely serrate or entire, apex acute or acuminate; mid and upper subsessile or sessile, blade linear-lanceolate or linear, smaller, margin entire or rarely 1- or 2-toothed. Capitula 3-4 mm in diam., numerous, in terminal, large paniculiform synflorescences; peduncles slender, 5-10 mm. Involucre subcylindric, 2.5-4 mm; phyllaries 2- or 3-seriate, greenish, abaxially sparsely strigose [or glabrous], linear-lanceolate or linear, acuminate, outer ca. 1/2 as long as inner, inner 3-3.5 × ca. 0.3 mm, margin scarious, glabrous. Ray florets 20-30(-45), white, 2.5-3.5 mm, lamina slightly longer than disk floret, apex 2-denticulate; disk florets 8-30, yellowish, 2.5-3 mm, tube sparsely puberulent, lobes 4 or 5. Achenes linear-lanceoloid, compressed, 1-1.5 mm, sparsely strigillose. Pappus 1-seriate, dirty white, bristles 15-25, 2.5-3 mm. Fl. May-Sep.

  • Provided by: [B].Flora Of CHina @ 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 CHina @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=2
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Missouri Botanical Garden
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).