| Collector | Congdon, G. |
| Number | 432 |
| Collected with | |
| Country | Thailand |
| Subpart | Songkla |
| County | |
| Locality | Dton Nhah Chang, Ampoe Haad Yai, Evergreen forest |
| Coordinates | |
| Minimum elevation (m) | 20 |
| Maximum elevation (m) | 250 |
| Start date | 1979/05/06 |
| End date | 1979/05/06 |
| Family | Acanthaceae |
| Identification | Thunbergia hamomacalyca Suwanph. |
| Determined by | C. Suwanphakdee & H. Balslev |
| Identification qualifier | |
| Field notes | Low spreading herb with tendrils; flower white, style exsert, calyx much divided; extremely common on moist damp hillside; not in flower one week ago and very few flowers just 4 days later on May 10. |
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