| Family | Asteraceae (alt. Compositae) |
| Scientific name | Aster microcephalus (Miquel) Franchet et Savatier var. ripensis Makino |
| Synonyms | Aster ageratoides Turczaninow subsp. ripensis (Makino) Kitamura; Aster ageratoides Turczaninow var. ripensis (Makino) Ohwi; Aster microcephalus (Miquel) Franchet et Savatier var. ripensis Makino; Aster ovatus (Franchet et Savatier) Mot. Ito & Soejima var. ripensis (Makino) Mot. Ito & Soejima; Aster trinervius D. Don subsp. ripensis (Makino) Kitamura |
| Common name | (Japanese common name) tanigawa-kon-giku (タニガワコンギク, 谷川紺菊 [meaning: mountain stream blue aster]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (west of Kinki region), Shikoku, Kyushu |
| (Other nations) none | |
| Habitat | Mountane riverside |
| Chromosomal number | 2n=36 |
| Description | Plants 20-40cam tall. Leaves 3-6cm long, 2-10mm wide. Flowers pale blue ca. 2-3cm across, flowering in September to November. Perennial plants. |
| Reference | Aster microcephalus (Miq.) Franch. & Sav. var. ripensis Makino |
| Aster ovatus Franch. et Sav. var. ripensis Makino |
| November 2006 at my home |
November 2006 at my home |
November 2006 at my home |
| November 2006 at my home |
November 2006 at my home |