Erigeron canadensis L., 1753

Common names

🇬🇧 Canadian Fleabane
🇫🇷 Érigéron du Canada, Conyze du Canada, Vergerette du Canada

Taxonomy

Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Superasterids
Clade: Asterids
Clade: Campanulids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Astereae
Subtribe: Conyzinae
Genus: Erigeron
Species: Erigeron canadensis

Presence

Introduced.

Conservation status

Red List (Metropolitan France): NA Not Applicable

Notes

Possible confusion with E. sumatrensis Retz., 1789, which has shorter ray florets (≤ 0.5 mm) that do not protrude past the involucre, while E. canadensis has longer ray florets (> 0.5 mm) that protrude past the involucre.

Pioneer weed that can establish itself, despite the lack of substrate, in small crevices in walls, roads, buildings,…

Hybridizes with E. bonariensis L., 1753 to produce E. × pseudocrispus Pierrot, 1950, P (het. syn. E. × foucaudii B.Bock, 2012).

Photographs

img/erigeron-canadensis.webp — *Erigeron canadensis*

img/erigeron-canadensis-2.webp — *Erigeron canadensis*

img/erigeron-canadensis-3.webp — *Erigeron canadensis* - Leaves

Sources

Tison, J.M., & de Foucault, B. (2014). Flora Gallica : Flore de France (p. 398). Biotope.