| Collector | Larsen, K. |
| Number | 42387 |
| Collected with | S. S. Larsen, C. Niyomdham, W. Ueachirakan & P. Sirirugsa. |
| Country | Thailand |
| Subpart | SATUN |
| County | |
| Locality | Boripath waterfall |
| Coordinates | 7° 0' N 100° 12' E |
| Minimum elevation (m) | 100 |
| Maximum elevation (m) | 200 |
| Start date | 1991/10/19 |
| End date | 1991/10/19 |
| Family | Acanthaceae |
| Identification | Justicia quadrifaria (Nees) T. Anderson |
| Determined by | Hansen, B. (C), 1993. |
| Identification qualifier | |
| Field notes | In bamboo scrub along stream. Flowers with white lower lip with few few violet spots. |