| Family | Asteraceae (alt. Compositae) |
| Scientific name | Erigeron thunbergii A. Gray |
| Synonyms | Aster dubius (Thunberg) Onno ex Kitamura; Inula dubia Thunberg |
| Common name | (Japanese common name) azuma-giku [eastern aster] |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu (north of Central region) |
| (Other nations) Russia (Far East) | |
| Chromosomal number | 2n=18 |
| Description | Plants 10-40cm. Leaves 4.5-8cm length, 1-2cm width. Flowers pale purple or white 3-3.5cm, flowering in April to June. Perennial plants. |
| Reference | Erigeron thunbergii A. Gray |
| (coastal type) | (coastal type) |
| April 2007 at Tsukuba Botanical Garden |
April 2007 at Tsukuba Botanical Garden |