Determined according to the botanical key provided in Flora Europaea Vol. 4 (Tutin et al., 1976).
Lifeform: Biennial; the first year of the lifecycle is vegetative (basal rosette stage). Flowering and fruiting occurs in the second year.
Distribution: Native from Canada to U.S.A., Nicaragua to Panama; introduced in Europe, parts of Asia and parts of North America according to the distribution information provided by the Plants of the World Online portal (Royal Botanic Gardens, Kew).
Habitat: Near rivers, paths, ruderal areas.
Flowering period: Summer- autumn: JUL, AUG, SEP.
Erigeron annuus subsp. septentrionalis -habit. Osogovo, Shtalkovichka River near village of Shtalkovica, 15.08.2020. Photo by Trajche Dimitrovski.Erigeron annuus subsp. septentrionalis -upper part of plant with capitula. Osogovo, Shtalkovichka River near village of Shtalkovica, 15.08.2020. Photo by Trajche Dimitrovski.Erigeron annuus subsp. septentrionalis -upper part of plant with capitula. Osogovo, Shtalkovichka River near village of Shtalkovica, 15.08.2020. Photo by Trajche Dimitrovski.Erigeron annuus subsp. septentrionalis -upper part of plant with capitula. Osogovo, Shtalkovichka River near village of Shtalkovica, 15.08.2020. Photo by Trajche Dimitrovski.Erigeron annuus subsp. septentrionalis – capitula. Osogovo, Shtalkovichka River near village of Shtalkovica, 15.08.2020. Photo by Trajche Dimitrovski.Erigeron annuus subsp. septentrionalis – stem with cauline leaves. Osogovo, Shtalkovichka River near village of Shtalkovica, 15.08.2020. Photo by Trajche Dimitrovski.Erigeron annuus subsp. septentrionalis plant in the first year of growth- vegetative (basal rosette) stage. Osogovo, Shtalkovichka River near village of Shtalkovica, 15.08.2020. Photo by Trajche Dimitrovski.Erigeron annuus subsp. septentrionalis – habit. Gorge of “Kochanska” River, 13.08.2020. Photo by Trajche Dimitrovski.Erigeron annuus subsp. septentrionalis – upper part of plant with capitula. Gorge of “Kochanska” River, 13.08.2020. Photo by Trajche Dimitrovski.Erigeron annuus subsp. septentrionalis – lower part of stem with cauline leaves. Gorge of “Kochanska” River, 13.08.2020. Photo by Trajche Dimitrovski.Erigeron annuus – basal leaf rosette of plant in the first year of growth. Gorge of “Kochanska” River, 13.08.2020. Photo by Trajche Dimitrovski.
Osogovo nature 