| Collector | Vessabutr, S. |
| Number | 831 |
| Collected with | S. Sasrirat, M. Norsaengsri |
| Country | Thailand |
| Subpart | Sakon Nakhon |
| County | |
| Locality | Pha Nang Moen, Phu Phan National Park, Phu Phan District |
| Coordinates | |
| Minimum elevation (m) | 300 |
| Maximum elevation (m) | 300 |
| Start date | 1999/07/21 |
| End date | 1999/07/21 |
| Family | Apocynaceae |
| Identification | Holarrhena curtisii King & Gamble |
| Determined by | |
| Identification qualifier | |
| Field notes | Under shrub 50-100 m in dry dipterocarp forest. All part with white latex. Flower white, fragrant, overlapping to right. |