| Collector | Thammarong, W. |
| Number | 3914 |
| Collected with | S. Rakarcha, S. Yokyo, C. Duangdang, M. Tabut |
| Country | Thailand |
| Subpart | Chiang Rai |
| County | |
| Locality | Ban Ing Doi, Khu Kaeng, Mae Yen, Mae Yen Sub-District, Phan district |
| Coordinates | |
| Minimum elevation (m) | 600 |
| Maximum elevation (m) | 700 |
| Start date | 2022/10/25 |
| End date | 2022/10/25 |
| Family | Acanthaceae |
| Identification | Gymnostachyum signatum (Benoist)Imlay |
| Determined by | |
| Identification qualifier | |
| Field notes | Ecology: mixed deciduous forest. Herb. Flower purple. |