Piper xanthostachyum C. DC., Anales Inst. Fis.-Geogr. Nac. Costa Rica. 1897 sec. Callejas Posada 2020
- =Piper bryogetum C. DC. in Bot. Gaz. 70(3): 175. 1920 syn. sec. The Plant List 2013
- =Piper flavirameum C. DC. in Bot. Gaz. 70(3): 181. 1920 syn. sec. ???