Guide to Liverworts of Oregon: Key to Genera 73
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1a plants thallose > 2b chloroplasts numerous > 62b thallus tissue complex > 70b terrestrial > 72b pores differentiated > 73
(Left: Marchantia; right: Lunularia cruciata, Lane Co., Oregon.)
73a Gemmae cups present on dorsal surface of thallus
(Couplet 74)
(Conocephalum conicum, Lincoln County, Oregon.)
73b Gemmae cups, gemmae absent
(Couplet 75)