| Family | Boraginaceae |
| Subfamily | Boraginoideae |
| Scientific name | Omphalodes japonica (Thunberg) Maximovicz |
| Synonyms | none |
| Common name | (Japanese common name) yama-ruri-sou (ヤマルリソウ, 山瑠璃草 [meaning: mountain lapis lazuli weed]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (south of Fukushima Prefecture), Shikoku, Kyushu |
| (Other nations) none | |
| Chromosomal number | unknown |
| Description | Plants 7-20cm tall. Leaves 7-20cm long, 2-5cm wide. Flowers pale blue ca. 1cm, flowering in April to May. Perennial plants. |
| Reference | Omphalodes japonica (Thunb.) Maxim. |
| April 2008 at Kyoto Botanical Garden |
April 2008 at Kyoto Botanical Garden |
April 2008 at Kyoto Botanical Garden |