| Collector | Larsen, K. |
| Number | 43569 |
| Collected with | S. S. Larsen, C. Niyomdham, P. Sirirugsa, D. D. Tirvengadum, C. T. Norgaard |
| Country | Thailand |
| Subpart | NAN |
| County | |
| Locality | Tham Pa Tok near Nan |
| Coordinates | 18° 48' N 100° 45' E |
| Minimum elevation (m) | 350 |
| Maximum elevation (m) | 350 |
| Start date | 1992/07/25 |
| End date | 1992/07/25 |
| Family | Euphorbiaceae |
| Identification | Trigonostemon albiflorus Airy Shaw |
| Determined by | van Welzen, P.C. (L), 1998. |
| Identification qualifier | |
| Field notes | "Unicate. Undershrub 3 m; petals white" |
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