| Collector | Maxwell, J.F. |
| Number | 86-362 |
| Collected with | |
| Country | Thailand |
| Subpart | Phatthalung |
| County | |
| Locality | Si Bahnpot. Kao Boo-Kao Yah National Park, near Mat Cha Cave. Shaded place next to limestone cliffs, primary evergreen forest. |
| Coordinates | |
| Minimum elevation (m) | 50 |
| Maximum elevation (m) | 50 |
| Start date | 1986/06/14 |
| End date | 1986/06/14 |
| Family | Rubiaceae |
| Identification | Hypobathrum hirtum (Ridl.) Mulyan. & Ridsdale |
| Determined by | Sawita Yooprasert |
| Identification qualifier | |
| Field notes | Treelet 2-3 m tall, 3 cm diameter; bark vertically cracked, brown; infructescence axes and fruits dull greenish; blades dark green above, green underneath. |
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