Guide to Liverworts of Oregon: Key to Scapania 4
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Scapania 1 oil bodies several per cell > Scapania 2b marginal teeth evenly spaced or lacking > Scapania 3a dorsal lobe decurrent > Scapania 4
Scapania americana - Right: Sweet Creek, Lane Co., Oregon. DHW 1247.
4a Keel straight or only slightly curved; usually with paraphyllia in axils of upper leaves; decurrent wing of dorsal lobe often convoluted and toothed; on rocks or soil, often near water though hardly aquatic, very common
Scapania americana
Scapania uliginosa - Quaking Aspen Swamp, Lane County, Oregon. DHW m1743.
4b Keel strongly curved; plant more or less aquatic, rare
Scapania uliginosa
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