| Family | Celastraceae |
| Subamily | Celastroideae |
| Scientific name | Euonymus hamiltonianus Wallich var. sieboldianus (Blume) Hara |
| Synonyms | Euonymus hamiltoniana Wallich var. yedoensis (Koehne) Blakelock; Euonymus hamiltonianus Wallich var. yedoensus (Koehne) Blakelock; Euonymus hians Koehne; Euonymus nikoensis Nakai; Euonymus semiexsertus Koehne; Euonymus sieboldianus Blume; Euonymus sieboldianus Blume var. yedoensus (Koehne) Hara; Euonymus vidalii Franchet & Savatier; Euonymus yedoensis Koehne; Euonymus yedoensus Koehne |
| Common name | (Japanese common name) mayumi (マユミ, 真弓 [meaning: bow tree]) |
| (English common name) Hamilton's spindletree | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu |
| (Other nations) Russia, Korea, China | |
| Habitat | Forest, forest edge |
| Chromosomal number | 2n=64 |
| Description | Plants 3-5m (max. 15m) tall. Leaves 5-15cm long. Flowers pale green (to pink) 8mm across, flowering in May to June. Fruits red ca. 8-10mm long. Deciduous. Shrub or arbor trees. |
| Reference | Euonymus hamiltonianus Wall. var. sieboldianus (Blume) Kom. |
| Euonymus hamiltonianus subsp. sieboldiana Hara | |
| Euonymus hamiltonianus Wallich in Roxburgh | |
| SCF Extract Containing Cardiac Glycoside (United States Patent Application 20080200401) |
| May 2007 at mountane forest edge |
May 2007 at mountane forest edge |
May 2007 at mountane forest edge |
| May 2007 at mountane forest edge |
May 2007 at mountane forest edge |
| July 2009 at the Imperial Palace |
| December 2007 at Tsukuba Botanical Garden |
December 2007 at Tsukuba Botanical Garden |