Erigeron bonariensis L. (syn. Conyza bonariensis (L.) Chronq.)

Posted byTrajche DimitrovskiPosted inCompositae

Taxonomy: Fam. Compositae// Genus: Erigeron// Species: Erigeron bonariensis L.

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

Lifeform: Annual, therophyte according to the Raunkiaer system.

Distribution: Native from Mexico to  South America, introduced elsewhere, according to the Plants of the World Online portal (Royal Botanic Gardens, Kew).

Habitat: Disturbed ground, alongside roads. Ruderal plant.

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

Locality: hilly region between the villahges of Beli and Nivichani. Date: 12.09.2021.

Erigeron bonariensis – habit. Osogovo, hilly region between the villages of Beli and Nivichani, 12.09.2021. Photo by Trajche Dimitrovski.
Erigeron bonariensis – habit. Osogovo, hilly region between the villages of Beli and Nivichani, 12.09.2021. Photo by Trajche Dimitrovski.
Erigeron bonariensis – synflorescence with capitula. Osogovo, hilly region between the villages of Beli and Nivichani, 12.09.2021. Photo by Trajche Dimitrovski.
Erigeron bonariensis – capitula. Osogovo, hilly region between the villages of Beli and Nivichani, 12.09.2021. Photo by Trajche Dimitrovski.
Erigeron bonariensis – flowering and fruiting capitula. Osogovo, hilly region between the villages of Beli and Nivichani, 12.09.2021. Photo by Trajche Dimitrovski.
Erigeron bonariensis – flowering and fruiting capitula with achenes. Osogovo, hilly region between the villages of Beli and Nivichani, 12.09.2021. Photo by Trajche Dimitrovski.
Erigeron bonariensis – stem and cauline leaves. Osogovo, hilly region between the villages of Beli and Nivichani, 12.09.2021. Photo by Trajche Dimitrovski.
Erigeron bonariensis – stem with cauline leaves. Osogovo, hilly region between the villages of Beli and Nivichani, 12.09.2021. Photo by Trajche Dimitrovski.
Erigeron bonariensis – stem with cauline leaves. Osogovo, hilly region between the villages of Beli and Nivichani, 12.09.2021. Photo by Trajche Dimitrovski.
Erigeron bonariensis – stem with cauline leaves. Osogovo, hilly region between the villages of Beli and Nivichani, 12.09.2021. Photo by Trajche Dimitrovski.
Erigeron bonariensis – abaxial side of cauline leaf. Osogovo, hilly region between the villages of Beli and Nivichani, 12.09.2021. Photo by Trajche Dimitrovski.

Locality: hilly region between the villages of Beli and Nivichani. Date: 20.09.2020.

Erigeron bonariensis – habit. Osogovo, hilly region between the villages of Beli and Nivichani, 20.09.2020. Photo by Trajche Dimitrovski.
Erigeron bonariensis – synflorescence. Osogovo, hilly region between the villages of Beli and Nivichani, 20.09.2020. Photo by Trajche Dimitrovski.
Erigeron bonariensis – capitula. Osogovo, hilly region between the villages of Beli and Nivichani, 20.09.2020. Photo by Trajche Dimitrovski.
Erigeron bonariensis – capitula. Osogovo, hilly region between the villages of Beli and Nivichani, 20.09.2020. Photo by Trajche Dimitrovski.
Erigeron bonariensis – fruiting capitula. Osogovo, hilly region between the villages of Beli and Nivichani, 20.09.2020. Photo by Trajche Dimitrovski.
Erigeron bonariensis – stem with cauline leaves) Osogovo,hilly region between the villages of Beli and Nivichani, 20.09.2020. Photo by Trajche Dimitrovski.

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 bonariensis. 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/70b157e2-b96d-44e8-8430-c4c2b6353244 [Accessed 09.04.2026].

Erigeron bonariensis. 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%20bonariensis&PTRefFk=7000000 [Accessed 29.11.2021].

Erigeron bonariensis L. Plants of the World Online, Royal Botanic Gardens Kew. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:93603-2 [Accessed 29.11.2021].

Last update: 09.04.2026.