| Collector | Christensen, H. M. |
| Number | 1598 |
| Collected with | |
| Country | Malaysia |
| Subpart | SARAWAK |
| County | |
| Locality | 2nd division, Lubok Antu District, river Delok. Disturbed young secondary forest on whitesand near Nanga Sumpa. |
| Coordinates | 1° 20' N 112° 10' E |
| Minimum elevation (m) | 150 |
| Maximum elevation (m) | 150 |
| Start date | 1993/10/20 |
| End date | 1993/10/20 |
| Family | Rubiaceae |
| Identification | Psychotria viridiflora Reinw. |
| Determined by | T.Srisuk |
| Identification qualifier | |
| Field notes | Tree some 4 m. tall. Fresh leaves with white mid rib. Uses: Dyeplant, leaves are used to dye textile reddish. Name in Iban language: Engkerebai Api. |
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