Guide to Liverworts of Oregon: Key to Genera 71
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1a plants thallose > 2b chloroplasts numerous > 62b thallus tissue complex > 70a floating aquatic > 71
Coyote Creek, Lane Co., Oregon. Photo: Bruce Newhouse, 1 August 2012.
71a Floating on surface of water; underside with long, purplish scales (scales reduced when stranded on wet soil); lobes dark green, 4-10 mm
wide; bifurcating with deep grooves and splitting into short fans (except when stranded).
Ricciocarpos natans
Riccia fluitans Frye & Clark 1937, p. 37.
71b Floating beneath surface of water or on moist earth or sand;ventral scales variable, not prominent, not long; lobes light green to reddish purple, 1.5-3.5 mm wide, grooves variable, often forming rosettes.
Riccia