Guide to Liverworts of Oregon: Key to Genera 78
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1a plants thallose > 2b chloroplasts numerous > 62b thallus tissue complex > 70b terrestrial > 72b pores differentiated > 73b gemmae absent > 75b trigones small or absent > 77a pores stellate > 78
Athalamia hyalina - Left: Hells Canyon, Wallowa County, Oregon. Morris s.n. Right: Elkhorn Ridge, Baker Co, Oregon. Wagner photo.
78a Pale ventral scales protruding conspicuously beyond thallus margins; female receptacles
arising from mid dorsal surface of thallus (unique in this regard among all thallose liverworts in the state); widespread
Athalamia hyalina
78b Ventral scales not conspicuous around thallus margins; female receptacles arising from edge of thallus, usually at apical notch; known only from Elkhorn Ridge, Baker County
Peltolepis quadrata