| Collector | Poulsen, A. D. |
| Number | 51 |
| Collected with | |
| Country | Brunei |
| Subpart | TEMBURONG |
| County | |
| Locality | Batu Apoi Forest Reserve. Setap shale formation. Ridge W. of Kuala Belalong Field Studies Center slope, mixed dipterocarp forest. |
| Coordinates | 4° 33' N 115° 9' E |
| Minimum elevation (m) | 250 |
| Maximum elevation (m) | 250 |
| Start date | 1991/05/09 |
| End date | 1991/05/09 |
| Family | Rubiaceae |
| Identification | Acranthera involucrata Valetin |
| Determined by | |
| Identification qualifier | |
| Field notes | Life form: terrestrial herb with woody base. Plant 50-70 cm tall hairy, corolla white, calyx and young fruits green. |
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