| Collector | Watthana, S. |
| Number | 636 |
| Collected with | P. Suksathan, G. Argent |
| Country | Thailand |
| Subpart | Mae Hong Son |
| County | |
| Locality | Ban Huai Hee, Doi Pui Luang, Mueang Mae Hong Son District |
| Coordinates | |
| Minimum elevation (m) | 1700 |
| Maximum elevation (m) | 1700 |
| Start date | 1999/08/24 |
| End date | 1999/08/24 |
| Family | Rubiaceae |
| Identification | Hedyotis uncinella Hook. & Arn. |
| Determined by | |
| Identification qualifier | |
| Field notes | Herb up to 30 cm tall in open of grassland; stem greenish-purple; calyx pale green; corolla pale purple. |