| Family | Calycanthaceae |
| Scientific name | Chimonanthus yunnanensis W. W. Smith |
| Synonyms | Meratia yunnanensis (W. W. Smith) Hu |
| Common name | (Japanese common name) un-nan rou-bai [yunnan waxen ume (ume = Japanese apricot)] |
| (English common name) wintersweet | |
| Distribution | (Japan) garden plants |
| (Other nations) [native] China | |
| Chromosomal number | 2n=22 |
| Description | Flowers yellow ca.2cm, flowering in January to March. Deciduous. Shrub. |
| Reference | Chimonanthus yunnanensis |
| Flower initiation inducer (US Patent 6057157/2000) | |
| Agents for inducing flower bud formation (US Patent 6174712/2001) | |
| Ketol fatty acid derivative and plant growth regulating agents (US Patnt 7026489/2006) | |
| Plant potentiators (US Patent 6987130/2006) |
| January 2008 at Koishikawa Botanical Garden |
January 2008 at Koishikawa Botanical Garden |
January 2008 at Koishikawa Botanical Garden |