| Collector | Maxwell, J.F. |
| Number | 87-158 |
| Collected with | |
| Country | Thailand |
| Subpart | Peninsular |
| County | |
| Locality | Surat Thani. Tachang. Ban Tahsae, Klong Sai Subdistrict. Open place, savannah |
| Coordinates | |
| Minimum elevation (m) | 10 |
| Maximum elevation (m) | 10 |
| Start date | 1987/02/05 |
| End date | 1987/02/05 |
| Family | Rubiaceae |
| Identification | Hedyotis tetrangularis (Korth.) Korth. ex Walp. |
| Determined by | |
| Identification qualifier | |
| Field notes | Stems, inflorescence axes, calyx green; corolla white; blades green above, light green underneath |
|