Table 2 The updated account of Premna in Thailand.

1. Premna annulata H. R. Fletcher

1. Premna annulata H. R. Fletcher

2. Premna collinsiae Craib

2. Premna pubescens Blume

P. collinsiae is synonymized under P. pubescens by Leeratiwong et al.⁵⁸

3. Premna cordifolia Roxb.

3. Premna cordifolia Roxb.

4. Premna coriacea C. B. Clarke (including P. coriacea var. villosa)

P. coriacea (sensu Leeratiwong) is P. scandens

5. Premna fulva Craib

4. Premna fulva Craib

6. Premna garrettii H. R. Fletcher

5. Premna garrettii H. R. Fletcher

7. Premna hamiltonii J. L. Ellis

6. Premna odorata Blanco

P. hamiltonii is synonymized under P. odorata (de Kok³)

8. Premna herbacea Roxb.

7. Premna herbacea Roxb.

9. Premna interrupta Wall. ex Schauer (including P. interrupta var. smitinandii

8. Premna interrupta Wall. ex Schauer

P. interrupta var. smitinandii is synonymized under P. interrupta (this study)

10. Premna mollissima Roth

9. Premna mollissima Roth

11. Premna nana Collett & Hemsl.

10. Premna nana Collett & Hemsl.

12. Premna octonervia Merr. & F. P. Metcalf

Recognized as P. mollissima

13. Premna paniculata H. R. Fletcher

11. Premna paniculata H. R. Fletcher

14. Premna punctulata C. B. Clarke

12. Premna punctulata C. B. Clarke

15. Premna pyramidata Wall. ex Schauer

13. Premna tomentosa Willd.

P. pyramidata is synonymized under P. tomentosa (de Kok³)

16. Premna rabakensis Moldenke

14. Premna rabakensis Moldenke

17. Premna repens H. R. Fletcher

15. Premna repens H. R. Fletcher

18. Premna scandens Roxb.

16. Premna scandens Roxb.

19. Premna serrata H. R. Fletcher

17. Premna serrata H. R. Fletcher

20. Premna serratifolia L.

18. Premna serratifolia L.

21. Premna siamensis H. R. Fletcher

19. Premna siamensis H. R. Fletcher

22. Premna stenobotrys Merr.

20. Premna stenobotrys Merr.

23. Premna trichostoma Miq.

21. Premna trichostoma Miq.