| Collector | Balslev, H. |
| Number | 9799 |
| Collected with | Voradol Chamchumroom, Witsanu Saisorn, Pirada Sumanon & Suwat Suwanachat |
| Country | Thailand |
| Subpart | Mae Hong Son province |
| County | |
| Locality | Sop Moei district. Mae Ngao National Park. Trail to the east of Park Head Quarters. Logged montane forest |
| Coordinates | 17° 50' 39'' N 97° 58' 46'' E |
| Minimum elevation (m) | 500 |
| Maximum elevation (m) | 700 |
| Start date | 2019/07/12 |
| End date | 2019/07/12 |
| Family | Rubiaceae |
| Identification | Ophiorrhiza alata Craib |
| Determined by | |
| Identification qualifier | cf. |
| Field notes | Ground herb. Flowers white. |
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