Table 1. Plants included in this study.
| Species | Abbrev. | Sample No. | Thai Vernacular name | Voucher No. |
|---|---|---|---|---|
| Croton cascarilloides Raeusch. 1 | CAS | 1 | Plao ngoen; ‘เปล้าเงิน’ | QBG38236 |
| Croton caudatus Geiseler 2 | CAU1CAU2 | 23 | Plao; ‘เปล้า’ | QBG8395QBG3389 |
| Croton crassifolius Geiseler | CR1CR2 | 45 | Pang khi; ‘ปังคี’ | QBG20547QBG10911 |
| Croton delpyi Gagnep. 3 | CD | 6 | Plao noi; ‘เปล้าน้อย’ | QBG13889 |
| Croton griffithii Hook.f. 2 | CG | 7 | Plao; ‘เปล้า’ | QBG32192 |
| Croton hutchinsonianus Hosseus 4 | CH1CH2 | 89 | Plao lueat; ‘เปล้าเลือด’ | QBG21732QBG2327 |
| Croton kongensis Gagnep. 1 , 3 | CK1CK2CK3 | 101112 | Plao noi; ‘เปล้าน้อย’, Plao ngoen; ‘เปล้าเงิน’ | QBG6677QBG3807QBG33093 |
| Croton poilanei Gagnep. 4 , 5 | CP | 13 | Plao luang; ‘เปล้าหลวง’, Plao yai; ‘เปล้าใหญ่’, Plao lueat; ‘เปล้าเลือด’ | QBG12427 |
| Croton robustus Kurz 5 | CRB1CRB2 | 1415 | Plao yai; ‘เปล้าใหญ่’ | QBG8309QBG5954 |
| Croton persimilis Müll.Arg. 5 , * | CRX1CRX2 | 1617 | Plao luang; ‘เปล้าหลวง’, Plao yai; ‘เปล้าใหญ่’ | QBG984QBG5997 |
| Croton tiglium L. | CB | 19 | Hat sakhuen; ‘หัสคืน’ | QBG10124 |
| Croton thorelii Gagnep. 3 | CT | 20 | Plao noi; ‘เปล้าน้อย’ | QBG29049 |
1 share the vascular name ‘Plao Ngoen’
2 share the vascular name ‘Plao’
3 share the vascular name ‘Plao Noi’
4 share the vascular name ‘Plao Lueat’
5 share the vascular names ‘Plao Luang’ and ‘Plao Yai’
* Synonym Croton roxburghii N.P.Balakr.