| Collector | Larsen, K. |
| Number | 46116 |
| Collected with | Supee S. Larsen, Christian Tange & Duangchai Sookchaloem |
| Country | Thailand |
| Subpart | NAN |
| County | |
| Locality | Doi Cham On 15 - 25 km E of Nan along road 1168. Dipterocarp forest on red lateritic soil |
| Coordinates | 18° 47' N 100° 57' E |
| Minimum elevation (m) | 400 |
| Maximum elevation (m) | 700 |
| Start date | 1995/09/06 |
| End date | 1995/09/06 |
| Family | Asclepiadaceae |
| Identification | Streptocaulon juventus (Lour.)Merr. |
| Determined by | Middleton, D. (HUH), 2000. |
| Identification qualifier | |
| Field notes | "climder; flowers yellowish to light brown" |
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