| Collector | Larsen, K. |
| Number | 45852 |
| Collected with | Supee S. Larsen, Christian Tange, Robbin Moran, T. Niyomdham & P. Puudjaa |
| Country | Thailand |
| Subpart | TRANG |
| County | |
| Locality | Thung Khai. Open swampy grassland with spring bogs. Sandy acid soil |
| Coordinates | 7° 27' N 99° 40' E |
| Minimum elevation (m) | 50 |
| Maximum elevation (m) | 50 |
| Start date | 1995/08/22 |
| End date | 1995/08/22 |
| Family | Lamiaceae |
| Identification | Rotheca serrata (L.) Steane & Mabb. |
| Determined by | C. Leeratirwong |
| Identification qualifier | |
| Field notes | Flowers pale violet to greenish. Common on sandy soil along trail |
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