| Collector | Meeboonya, R. |
| Number | RM254 |
| Collected with | Balslev, H., Aubriot, X., Karaket, P. & Yooprasert, S. |
| Country | Thailand |
| Subpart | Prachuap Khiri Khan |
| County | |
| Locality | Mueang. Near Bang Nang Rom Dam, opposite of the beach. |
| Coordinates | 11° 48' 55'' N 99° 47' 58'' E |
| Minimum elevation (m) | 18 |
| Maximum elevation (m) | 18 |
| Start date | 2014/06/24 |
| End date | 2014/06/24 |
| Family | Euphorbiaceae |
| Identification | Euphorbia antiquorum L. |
| Determined by | |
| Identification qualifier | |
| Field notes | Cactus form, 3-4 m high; stems 20 cm diameters of the base; branches trigonous, green, spines black; flowers cyathium like green to yellow; gland up right; bract of cyathium green; stigma 3; latex white. Phenology Fw |