| Collector | Nielsen, I.C. |
| Number | 1634 |
| Collected with | C. Niyomdham, T. Jonganurak, N. Hemrath & J. Rithipheth |
| Country | Thailand |
| Subpart | Nong Khai |
| County | |
| Locality | Bungkla distr.Tambon Nong Dern |
| Coordinates | 17° 50' N 103° 40' E |
| Minimum elevation (m) | 460 |
| Maximum elevation (m) | 460 |
| Start date | 2004/08/10 |
| End date | 2004/08/10 |
| Family | Rubiaceae |
| Identification | Argostemma |
| Determined by | |
| Identification qualifier | |
| Field notes | Ten years old regrowth of dry deciduous Dipterocarp forest. Erect herb in shaded habitat; leaves bright green; corolla white |
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