| Collector | Middleton, D.J. |
| Number | 4754 |
| Collected with | P.Karaket, S. Lindsay and S. Suddee |
| Country | Thailand |
| Subpart | Kanchanaburi |
| County | |
| Locality | Sangkhlaburi District: Khao Laem National Park, Road up Khao radar. Dry evergreen forest. Granite bedrock |
| Coordinates | 15° 3.2' N 98° 35.8' E |
| Minimum elevation (m) | 700 |
| Maximum elevation (m) | 700 |
| Start date | 2009/01/22 |
| End date | 2009/01/22 |
| Family | Acanthaceae |
| Identification | Justicia tenuissima J.B.Imlay |
| Determined by | Kanokorn Rueangsawang |
| Identification qualifier | |
| Field notes | Terrestrial herb. Leaves dark green above, slightly paler beneath. Inflorescence axes and calyx dark green. Corolla white with purple spots on ventral surface inside and tips af lower 3 lobes |
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