- Aristolochia mossii, Aristolochia dubia
- Calochlaena dubia, Rainbow Fern;Common Ground-fern;Common Ground Fern;Davallia dubia RBr;Davallia dubia RBr var dubia;Trichomanes dubia RBr Poir;Dicksonia dubia RBr Gaudich;Sitobolium dubium RBr Brack;Balantium dubium RBr Copel;Culcita dubia RBr Maxon;Davallia cristatella Gand;Davallia muelleri Gand;Davallia tasmanica Gand;Hemitelia godeffroyi Luerss;Balantium brownianum CPresl;Culcita blepharodes Maxon
- Frullania intumescens, Frullania clandestina;Frullania closterantha;Frullania cucullata;Frullania dubia;Frullania evolutiloba;Frullania fallax Steph;Frullania fusco-brunnea;Frullania longicollis;Frullania pachoensis;Lejeunea clandestina
- Hoplitis recta, Osmia (Melanosmia) recta Pérez, 1902;Hoplitis recta (Pérez, 1902), nomia dubia
- Jungermannia dubioides, Jungermannia dubia
- Metzgeria foliicola, Metzgeria cristata;Metzgeria cristatissima;Metzgeria dubia
- Monstera dubia, Marcgravia dubia;Monstera acreana;Monstera irritans
- Piper foveolatum, Piper poiteanum;Enckea dubia
- Plagiochila patula, Plagiochila bakeri;Plagiochila barutana;Plagiochila buchii;Plagiochila dubia var dubia;Plagiochila dubia;Plagiochila effuse-ramea;Plagiochila intermedia;Plagiochila socia
- Plauditus dubius, Baetis dubius;Cloe dubia;Cloeon chlorops McDunnough, 1923;Cloeon dubium;Pseudocloeon chlorops;Pseudocloeon dubium;Little slatewinged brown quill
- Polysporina lapponica, Polysporina dubia
- Pycnolejeunea densistipula, Lejeunea cryptantha;Lejeunea densistipula;Pycnolejeunea densistipula var dubia;Pycnolejeunea galathea;Pycnolejeunea parvilobula
- Urospatha sagittifolia, Urospatha sagittifolia var spruceana;Urospatha decipiens;Urospatha dubia;Arum sagittaefolium;Urospatha caudata;Urospatha hostmannii;Urospatha savannarum;Pothos sagittaefolia;Spathiphyllum caudatum;Urospatha spruceana
- Utricularia nana, Utricularia arenicola var kavanayena;Utricularia dubia;Utricularia arenicola
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