Guide to Liverworts of Oregon: Key to Cephalozia 4
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Cephalozia 1a sinus >0.5 of leaf > Cephalozia 2a cells at lobe base <25μ wide > Cephalozia 3b leaves not wider than stem > Cephalozia 4
Cephalozia leucantha, Queen Charlotte Is., British Columbia. WB Schofield 33896.
4a Leaf lobes (2) 4-5 cells wide at base; leaves bifid 0.5 -0.6 their length; leaves usually remote; perianth mouth crenulate-dentate; rare.
Cephalozia leucantha
Heather Lake, Snohomish Co., Washington. D.H. Norris 101215a
4b Leaf lobes 2-3 (4) cells wide at base; leaves bifid 0.7 - 0.8 their length; leaves mainly remote to contiguous; perianth mouth ciliate; very rare.
Cephalozia macounii