Guide to Liverworts of Oregon: Key to Genera 22
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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 > 20a lobule present > 21b underleaves present > 22
Frullania franciscana, Yaquina Head, Lincoln Co., Oregon. DHW m2217.
22a Lobule modified into an urn- or hood-shaped structure attached to the stem by a short, slender
stalk
Frullania
Porella navicularis, Goodman Creek, Lane Co., Oregon. DHW m1778b.
22b Lobule merely a leafy flap, not greatly modified
Porella