- Anoma nigrescens, Cylindrella crassa;Anoma leucostoma ;Anoma levior ;Helix maugeri ;Cylindrella quadricolor ;Cylindrella rufilabris
- Dulacia crassa, Liriosma crassa
- Frullania ecklonii, Frullania ecuadoriensis;Frullania crassa;Frullania emergens;Frullania longirostris;Frullania viminicola;Jungermannia ecklonii
- Marchantia berteroana, Marchantia tabularis Nees;Marchantia polymorpha var tabularis Nees Mitt ex Gottsche;Marchantia cephaloscypha Steph;Marchantia paludicola Steph;Marchantia berteroana var anactis;Marchantia berteroana var polylepida;Marchantia cephaloscypha;Marchantia contracta;Marchantia crassa;Marchantia discoidea;Marchantia paludicola;Marchantia polymorpha var tabularis;Marchantia tabularis
- Ramalina siliquosa, Ramalina breviuscula auct brit;Ramalina polymorpha auct brit pp;Ramalina scopulorum;Ramalina siliquosa var crassa;Ramalina siliquosa var druidarum
- Riccardia crassa, Jungermannia crassa Schwagr;Aneura crassa Schwagr Nees;Sarcomitrium crassum Schwagr Mitt;Aneura stolonifera Steph;Aneura rufescens Steph;Aneura walesiana Steph;Aneura longiflora f submersa Rodway;Aneura coriacea Steph;Aneura spathuliloba Steph;Riccardia stolonifera Steph EAHodgs;Aneura coriacea;Aneura crassa;Aneura longiflora fo submersa;Aneura rufescens;Aneura spathuliloba;Aneura stolonifera;Aneura walesiana;Jungermannia crassa;Riccardia stolonifera;Sarcomitrium crassum
- Riccia beyrichiana, Riccia beyrichiana var glaucescens;Riccia glaucescens;Riccia lescuriana var glaucescens;Riccia lescuriana;Riccia lesquereuxii;Riccia levieri;Riccia subinermis var crassa
- Riccia bullosa, Riccia crassa;Riccia montaguensis
- Squamarina cartilaginea, Squamaria crassa;Squamarina cartilaginea var cartilaginea;Squamarina cartilaginea var pseudocrassa;Squamarina crassa forma pseudocrassa;Squamarina crassa var pseudocrassa
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