| Family | Lamiaceae (alt. Labiatae) |
| Subfamily | Ajugoideae |
| Scientific name | Ajuga boninsimae Maximovicz |
| Synonyms | none |
| Common name | (Japanese common name) shima-kako-sou (シマカコソウ, 島夏枯草 [meaning: Ogasawara Islands kako weed (kako = plants which leaves are dead in summer time)]) |
| (English common name) none | |
| Distribution | (Japan) Ogasawara Islands |
| (Other nations) none | |
| Habitat | Mountane forest edge |
| Chromosomal number | unknown |
| Description | Plants ca. 20-30cm tall. Flowers white, flowering in December to March. Perennial plants. |
| Reference | Ajuga boninsimae Maxim. |
| Note | Native to Japan. Rare species. |
| March 2008 at Koishikawa Botanical Garden |
December 2006 at Koishikawa Botanical Garden |
December 2006 at Koishikawa Botanical Garden |