Erigeron canadensis L. (Conyza canadensis (L.) Chronq.)

Taxonomy: Fam. Compositae// Genus: Erigeron// Species: Erigeron canadensis Retz.

Determined according to the botanical key provided by Cronquist (1976 in Tutin et al.) as Conyza canadensis (L.) Chronq. (syn. Erigeron canadensis L.) The accepted name in The Euro+Med PlantBase (Greuter, 2006+) is Erigeron canadensis L.

Lifeform: Annual, therophyte according to the Raunkiaer system.

Distribution: Native from North to South America and introduced elsewhere according to the distribution information provided by the Plants of the World Online portal (Royal Botanic Gardens, Kew).

Habitat: Disturbed ground, alongside roads and paths, near orchards, gardens and cultivated land, waste places, near and in settlements. Ruderal plant.

Flowering period: Summer- autumn (AUG, SEP).

Locality: gorge of the Kochanska River. Date: 29.08.2021.

*Erigeron canadensis* – habit. Gorge of “Kochanska” River, 29.08.2021. Photo by Trajche Dimitrovski.

Locality: gorge of the Kochanska River. Date: 28.08.2020.

*Erigeron canadensis* – habit. Gorge of “Kochanska” River, 28.08.2020. Photo by Trajche Dimitrovski.

Scaled image of capitula.

References:

Cronquist, A. 1976. Conyza L. In Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A. (eds.), Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae). Cambridge: Cambridge University Press.

Erigeron canadensis. Greuter, W. 2006+: Compositae (pro parte majore). – In: Greuter, W. & Raab-Straube, E. von, Compositae. Euro+Med PlantBase – the information resource for Euro-Mediterranean plant diversity. Published at https://europlusmed.org/. https://europlusmed.org/cdm_dataportal/taxon/f400e31e-64f3-4a4e-bf00-a7d31d8d9692 [Accessed 09.04.2026].

Erigeron canadensis. Greuter, W. (2006+): Compositae (pro parte majore). – In: Greuter, W. & Raab-Straube, E. von (ed.): Compositae. Euro+Med Plantbase – the information resource for Euro-Mediterranean plant diversity. http://ww2.bgbm.org/EuroPlusMed/PTaxonDetail.asp?NameCache=Erigeron%20canadensis&PTRefFk=7000000 [Accessed 29.11.2021].

Erigeron canadensis L. Plants of the World Online, Royal Botanic Gardens Kew. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:203653-1 [Accessed 30.11.2021].

Last update: 09.04.2026.

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