Guide to Liverworts of Oregon: Key to Riccia 7
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Riccia 1b terrestrial > Riccia 2b marginal projections lacking > Riccia 5b surface smooth > Riccia 7
Riccia sorocarpa. Cave Creek, Josephine County, Oregon. DHW m1358.
7a Upper surface with a deep, narrow groove.
Riccia sorocarpa
Riccia glauca. Goodman Creek, Lane Co., Oregon. DHW m1780.
7b Upper surface with a shallow groove or no groove posterior to apex.
(Couplet 8)