| Collector | Middleton, D.J. |
| Number | 1587 |
| Collected with | Somran Suddee, Chandee Hemrat |
| Country | Thailand |
| Subpart | Phetchaburi |
| County | |
| Locality | Amphoe Kaeng Krachan; Kaeng Krachan National Park. Trail from Khao Phanoen Thung Ranger Substation to KU Camp. Deep shade on ridge in primary evergreen forest. |
| Coordinates | 12° 51' N 99° 18' E |
| Minimum elevation (m) | 300 |
| Maximum elevation (m) | 300 |
| Start date | 2002/12/12 |
| End date | 2002/12/12 |
| Family | Acanthaceae |
| Identification | Justicia quadrifaria (Nees) T. Anderson |
| Determined by | Kanokorn Rueangsawang |
| Identification qualifier | |
| Field notes | Herb to 50 cm tall. Leaves dark green above, glaucous beneath. Corolla tube and upper lipgreenish-white, lower lip white, speckled pink inside. Anthers yellow red. |
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