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(First upload on April 17 2018. Last on August 12 2018) [ 日本語 | English ]

Erigeron L. (ムカシヨモギ) O-arechinogiku (オオアレチノギク, 大荒地野菊), Sumatran fleabane, tall fleabane, broad-leaved fleabane and white horseweed Lifeform: weedy, (annual or) biennial forb, with 1-2 m tall when flowering and developing rosettes Distribution: probably native to the South America introduced to Japan in early Showa Era (now distributed in south to Honshu) Habitat: waste lands, roadsides, etc. Flower: no ligulate ↔ E. canadensis

Seed dispersal: wind Synonyms: Erigeron floribundus auct. non (Kunth) Sch. Bip. Conyza sumatrensis (Retz.) E. Walker, used when established this genus Conyza floribunda auct. non Kunth

Erigeron sumatrensis in Japan

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[1-3] close to Toshiba Building near JR Hamamatsu Station in Tokyo on June 15 2018. [4/5] in the Shimizudani Park, close to Sophia University, on November 24 2017.