Orthrosanthus monadelphus Ravenna in Bol. Soc. Argent. Bot. 10: 317. 1965 sec. Espejo-Serna & López-Ferrari 2008
- =Orthrosanthus chimboracensis var. centroamericanus Steyerm. in Lloydia 11: 19. 1948 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Orthrosanthus chimboracensis var. intermedius Steyerm. in Lloydia 11: 19-20. 1948 syn. sec. Espejo-Serna & López-Ferrari 2008