| Collector | Loc, P.K. |
| Number | CBL2055 |
| Collected with | P.H. Hoang & L. Averyanov |
| Country | Vietnam |
| Subpart | Ha Giang |
| County | |
| Locality | distr. Yen Minh, municipality Du Gia, E slopes of Phu Tha Ca mountain system. Primary evergreen broadleaved very wet mountain forest on shale very steep slopes |
| Coordinates | 23° 56' N 105° 13' E |
| Minimum elevation (m) | 1100 |
| Maximum elevation (m) | 1200 |
| Start date | 1999/05/03 |
| End date | 1999/05/03 |
| Family | Rubiaceae |
| Identification | Lasianthus longissimus H.Zhu |
| Determined by | |
| Identification qualifier | |
| Field notes | Shrub 2-3 m hg in open place. Flowers light violet. Not common. |
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