- Bazzania flaccida, Bazzania denudata non Torrey ex Gottsche & al Trevis;Bazzania tricrenata var cavernarum;Herpetium deflexum var pygmaeum;Jungermannia deflexum var flaccida;Pleuroschisma flaccida;Pleuroschisma flaccidum
- Bazzania tricrenata, Bazzania alpina;Bazzania deflexa;Bazzania fissifolia fo hamata;Bazzania fissifolia fo subsimplex;Bazzania fissifolia var subsimplex;Bazzania fissifolia;Bazzania jishibae;Bazzania remotifolia Horik;Bazzania triangularis;Bazzania tricrenata var deflexa;Bazzania tricrenata var intercedens;Bazzania tricrenata var minima;Bazzania tricrenata var pygmaea;Herpetium deflexum;Jungermannia deflexa;Jungermannia triangularis;Jungermannia tricrenata;Jungermannia trilobata var minima;Mastigobryum alpinum Steph 18xx;Mastigobryum alpinum Steph 1908;Mastigobryum cordifolium Steph 1908;Mastigobryum cordifolium auct;Mastigobryum deflexum var pygmaeum;Mastigobryum deflexum;Mastigobryum fissifolium;Mastigobryum hamatum;Mastigobryum jishibae;Mastigobryum longanum;Mastigobryum perrottetii Steph 1924 non Steph 1908;Mastigobryum subhamatum;Mastigobryum triangulare;Mastigobryum tricrenatum;Pleuroschisma alpinum;Pleuroschisma deflexum;Pleuroschisma parvulum;Pleuroschisma triangulare;Pleuroschisma tricrenatum var deflexum;Pleuroschisma tricrenatum var implexum;Pleuroschisma tricrenatum
- Cercyon pygmaeus, Sphaeridium pygmaeum;Sphaeridium apicale Say, 1823
- Muellerella pygmaea, Muellerella pygmaea var pygmaea;Tichothecium pygmaeum;Endococcus pygmaeus;Microthelia ecatonospora;Microthelia pygmaea, Mycoporum pygmaeum;Pyrenula pygmaea;Sychnogonia pygmaea
- Prosthechea pygmaea, Dwarf butterfly orchid;Encyclia pygmaea;Epidendrum pygmaeum;Epidendrum caespitosum;Dwarf Clamshell-Orchid
- Rhodanthe pygmaea, Pigmy Sunray;Pteropogon pygmaeum Dc;Pteropogon pygmaeus orth var FMuell sensu Mueller, FJH von 1854;Pteropogon australis Nees;Helipterum pygmaeum Dc FMuell;Helipterum pygmaeum Dc FMuell var pygmaeum;Helipterum pygmaeum Dc Benth;Argyrocome pygmaea Dc Kuntze;Pteropogon drummondii AGray;Helipterum pygmaeum var occidentale Benth;Helipterum pygmaeum var drummondii AGray Ostenf;Helipterum drummondii AGray Ostenf;Pteropogon intermedius FMuell
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