| Family | Caryophyllaceae |
| Subfamily | Alsinoideae |
| Tribe | Alsineae |
| Scientific name | Stellaria nipponica Ohwi |
| Synonyms | Stellaria florida Fischer ex de Candolle var. angustifolia Maximowicz |
| Common name | (Japanese common name) iwa-tsumekusa (イワツメクサ, 岩爪草 [meaning: rocks tsumekusa (tsumekusa = Sagina japonica)]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (high mountains in Central region, Mt. Fuji, Mt. Yatsugatake, Mt. Mitake) |
| (Other nations) China (Hubei) | |
| Habitat | Alpine rocks |
| Chromosomal number | 2n=26 |
| Description | Plants 10-20cm. Leaves 1-2mm width. Flowers white ca. 1.5m, flowering in July to September. Perennial plants. |
| Reference | Stellaria nipponica Ohwi |
| July 2007 at Mt. Johnen (Photo by my elder son) |
July 2007 at Mt. Johnen (Photo by my elder son) |
July 2007 at Mt. Johnen (Photo by my elder son) |