| Collector | La-ongsri, W. |
| Number | 5665 |
| Collected with | P. Panyachan, P. Tatiya, S. Satata & S. Wongwan |
| Country | Thailand |
| Subpart | Kanchanaburi |
| County | |
| Locality | Si Sawat District, Chaloem Rattanakosin National Park, Than Lod Yai cave |
| Coordinates | 14° 39' 18.21'' N 99° 17' 25.21'' E |
| Minimum elevation (m) | 505 |
| Maximum elevation (m) | 505 |
| Start date | 2018/06/27 |
| End date | 2018/06/27 |
| Family | Asclepiadaceae |
| Identification | Heterostemma siamicum Craib |
| Determined by | |
| Identification qualifier | |
| Field notes | Climber by stream in mixed-deciduous forest. Flower yellow. |
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