| Collector | Larsen, K. |
| Number | 41987 |
| Collected with | S. S. Larsen, W. Nanakorn, W. Ueachirakan & P. Sirirugsa. |
| Country | Thailand |
| Subpart | NAN |
| County | |
| Locality | Tham Pa Tok near Nan. Limestone outcrops |
| Coordinates | 18° 48' N 100° 45' E |
| Minimum elevation (m) | 350 |
| Maximum elevation (m) | 350 |
| Start date | 1990/12/14 |
| End date | 1990/12/14 |
| Family | Acanthaceae |
| Identification | Justicia scandens Vahl |
| Determined by | Hansen, B. (C), 1991. |
| Identification qualifier | |
| Field notes | Trailing herb with up to l m long shoots. Flowers whitish with pink spots on lower lip.- Alc. |
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