Guide to Liverworts of Oregon: Key to Riccia 9
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Riccia 1b terrestrial > Riccia 2b marginal projections lacking > Riccia 5b surface smooth > Riccia 7b upper surface groove shallow > Riccia 8b ventral scales pale > Riccia 9
Riccia glauca. Goodman Creek, Lane Co., Oregon. DHW m1780.
9a Dorsal groove absent except at very apex of thallus; thallus plane above; thallus margins green to brown.
Riccia glauca
Riccia campbelliana. Wagontire Rock, Monterey Co., California. DHW m1235b.
9b Dorsal groove present, though shallow and inconspicuous; margins of older parts orange to reddish brown.
Riccia campbelliana