| Psychotria foveolata Ruiz & Pav., 1799 |
| Psychotria fruticetorum Standl., 1930 |
| Psychotria furcata DC., 1830 |
| Psychotria galeottiana (M. Martens) C.M. Taylor & Lorence, 1985 |
| Psychotria gardenioides (Scheidw.) Standl., 1927 |
| Psychotria gatunensis Dwyer & Hayden, 1967 |
| 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 |