Guide to Liverworts of Oregon: Key to Marsupella 2
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Marsupella 1a plants paroicous > Marsupella 2
Douglas Co., Oregon. R. Helliwell 10051
2a Cells with 3-6 oil bodies in middle of leaf; elaters 3-7 spiral
Marsupella sp. nov. ined. ("cascadensis")
2b Cells with 2 (3) oil bodies in middle of leaf; elaters 2(3) spiral
(Couplet 3)