| Collector | Koyama, T. |
| Number | 15620 |
| Collected with | et al. |
| Country | Thailand |
| Subpart | Northern |
| County | |
| Locality | Doi Chiangdao, Chiangmai. On limestone ridge, in open space |
| Coordinates | |
| Minimum elevation (m) | 1700 |
| Maximum elevation (m) | 1800 |
| Start date | 1979/03/03 |
| End date | 1979/03/03 |
| Family | Plumbaginaceae |
| Identification | Ceratostigma asperrimum Stapf ex Prain |
| Determined by | |
| Identification qualifier | |
| Field notes | Under-shrub. Flowers blue |
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