| Collector | La-ongsri, W. |
| Number | 2831 |
| Collected with | M. Norsaengsri, P. Panyachan, P. Tatiya, S. Satatha |
| Country | Thailand |
| Subpart | Phayao |
| County | |
| Locality | Phu Sang Waterfall, Phu Sang National Park Phu Sang District |
| Coordinates | |
| Minimum elevation (m) | 451 |
| Maximum elevation (m) | 451 |
| Start date | 2013/04/30 |
| End date | 2013/04/30 |
| Family | Euphorbiaceae |
| Identification | Trigonostemon albiflorus Airy Shaw |
| Determined by | |
| Identification qualifier | |
| Field notes | Shrub 1 m high on limestone near stream. Flowers white-cream. |
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