Guide to Liverworts of Oregon: Key to Genera 20
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1b plants leafy > 3b leaves not divided, not ciliate > 6a oil bodies 2+ or unknown > 7b no small dorsal lobe > 10b leaves incubous > 20
Left: Frullania, right: Radula.
20a Leaves with a basal lobule folded under on the ventral side, not visible from above
(Couplet 21)
Calypogeia fissa, Douglas Co., Oregon. DHW 8814.
20b Leaves lacking a lobule
(Couplet 23)