Prosthechea pygmaea (Hook.) W.E. Higgins in Phytologia 82(5): 380. 1997 sec. Soto-Arenas & al. 2007
- ≡Epidendrum pygmaeum Hook. in Bot. Mag. 60: t. 3233. 1833 syn. sec. Soto-Arenas & al. 2007
- =Epidendrum caespitosum Poepp. & Endl., Nov. Gen. Sp. Pl. 2: 1, t. 101. 1837 syn. sec. Bogarín & al. 2014
- =Epidendrum uniflorum Lindl. in Edwards's Bot. Reg. 25: Misc. 15. 1839 syn. sec. Dressler & Pollard 1976
- =Epidendrum monanthum Steud., Nomencl. Bot. (ed. 2) 1: 588. 1840 syn. sec. Bogarín & al. 2014
- =Hormidium uniflorum (Lindl.) Heynh., Nom. Bot. Hort.: 880. 1841 syn. sec. Bogarín & al. 2014
- =Hormidium pygmaeum (Hook.) Benth. & Hook. f. ex Hemsl. in Gard. Chron. 19: 700. 1881 syn. sec. Soto-Arenas & al. 2007
- =Hormidium tripterum (Brongn.) Cogn., Fl. Bras. 3(5): 29, pl. 8. 1898 syn. sec. Dressler & Pollard 1976
- =Microstylis humilis Cogn., Fl. Bras. 3(6): 550, t. 114. 1906 syn. sec. Bogarín & al. 2014
- =Hormidium humile (Cogn.) Schltr. in Repert. Spec. Nov. Regni Veg. 16: 331. 1920 syn. sec. Bogarín & al. 2014
- =Encyclia pygmaea (Hook.) Dressler in Brittonia 13(3): 265. 1961 syn. sec. Soto-Arenas & al. 2007
- =Encyclia triptera (Brongn.) Dressler & G.E. Pollard in Phytologia 21(7): 436. 1971 syn. sec. Bogarín & al. 2014