| Psychotria pulverulenta Urb., 1913 |
| Psychotria purpusii Standl., 1926 |
| Psychotria quiinifolia Dwyer, 1966 |
| Psychotria quinqueradiata Pol., 1877 |
| Psychotria racemosa (Aubl.) Rich., 1792 |
| Psychotria rufescens Kunth, 1819 |
| Psychotria rzedowskiana Borhidi, 2004 |
| Psychotria salicifolia (Oerst.) Hemsl., 1881 |
| Psychotria sarapiquensis Standl., 1938 |
| Psychotria scabriuscula Bartl. ex DC., 1830 |
| Psychotria schippii Standl. & Steyerm., 1943 |
| Psychotria sessilifolia M. Martens & Galeotti, 1844 |
| Psychotria siggersiana Standl., 1925 |
| Psychotria simiarum Standl., 1929 |
| Psychotria simiarum subsp. chiapensis C.M. Taylor, 2004 |
| Psychotria simiarum subsp. simiarum Standl., 1929 |
| Psychotria skutchii Standl., 1937 |
| Psychotria sousae Lorence & Dwyer, 1987 |
| Psychotria steyermarkii Standl., 1940 |
| Psychotria stipulata (Oerst.) Hemsl., 1881 |