| Collector | Nielsen, I.C. |
| Number | 1900 |
| Collected with | Somran Suddee; N. Hemrath & J. Rithipheth |
| Country | Thailand |
| Subpart | Kanchanaburi |
| County | |
| Locality | Thong Pha Phum National Park; ca. 7 km below Park HQ |
| Coordinates | 14° 40' N 98° 30' E |
| Minimum elevation (m) | 700 |
| Maximum elevation (m) | 700 |
| Start date | 2004/08/23 |
| End date | 2004/08/23 |
| Family | Acanthaceae |
| Identification | Gymnostachyum signatum (Benoist)Imlay |
| Determined by | D.Yunfei |
| Identification qualifier | |
| Field notes | Bamboo Forest. Acaulescent herb, leaves purplish tinged beneath, greenish with dark green veins above, corolla green with violet lips |
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