| Family | Symplocaceae |
| Scientific name | Symplocos pergracilis (Nakai) Yamazaki |
| Synonyms | none |
| Common name | (Japanese common name) chichijima-kuroki (チチジマクロキ, 父島黒木 [meaning: Chichijima Island black tree]) |
| (English common name) none | |
| Distribution | (Japan) Ogasawara Islands (Chichijima Island, Anijima Island) |
| (Other nations) none | |
| Chromosomal number | unknown |
| Description | Plants 1-2m tall. Leaves 3-5cm long, 1.5-2.5cm wide, pedicels 1-1.3cm long. Flowers pale yellow 7-12mm across, flowering in December to February. Fruits 15mm long. Evergreen. Shrub. |
| Note | Rare species. Native to Japan. |
| December 2006 at Koishikawa Botanical Garden |
January 2007 at Koishikawa Botanical Garden |
December 2006 at Koishikawa Botanical Garden |