| Psychotria glauca Polák, 1877 |
| Psychotria glaucescens Kunth, 1819 |
| Psychotria glomerata Kunth, 1819 |
| Psychotria glomerulata (Donn. Sm.) Steyerm., 1972 |
| Psychotria gracilenta Müll. Arg., 1876 |
| Psychotria graciliflora Benth., 1853 |
| Psychotria granadensis Benth. ex Oerst., 1853 |
| Psychotria grandicarpa Dwyer & Hayden, 1968 |
| Psychotria grandis Sw., 1788 |
| Psychotria grandistipula Standl., 1928 |
| Psychotria guadalupensis (DC.) Howard, 1966 |
| Psychotria guadalupensis subsp. tetrapyrena Steyerm., 1972 |
| Psychotria hebeclada DC., 1830 |
| Psychotria herbacea Jacq., 1760 |
| Psychotria heydei Standl., 1928 |
| Psychotria hidalgensis Borhidi, 2004 |
| Psychotria hirsuta (M. Martens & Galeotti) Müll. Arg. ex Lorence, 1993 |
| Psychotria hirta Humb. & Bonpl. ex Roem. & Schult., 1819 |
| Psychotria hoffmannseggiana (Willd. ex Roem. & Schult.) Müll. Arg., 1881 |
| Psychotria horizontalis Sw., 1788 |