Guide to Liverworts of Oregon: Key to Riccia 2
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Riccia 1b terrestrial > Riccia 2
Riccia beyrichiana. Pine Creek, Modoc Co., California. DHW m1462
2a Marginal cilia or spines present.
(COUPLET 3)
Riccia sorocarpa. Spencer Butte, Lane Co., Oregon. DHW m1358.
2b Marginal cilia or spines lacking.
(COUPLET 5)