Guide to Liverworts of Oregon: Key to Genera 68
1a plants thallose > 2b chloroplasts numerous > 62a thallus tissue homogeneous > 63b thallus ribbon like > 65b ventral scales absent > 66b thallus without hairs > 67a sex organs on branches > 68
(Aneura pinguis, Linn Co., Oregon. DHW m1284)
68a Thallus 3-10 mm wide, glossy dark green; branching more or less pinnate; oil bodies small,numerous, 10-30 per cell; plants prostrate
Aneura pinguis
(Riccardia palmata, Coos Co., Oregon. DHW 9369)
68b Thallus 1-2 mm wide, dull olive green to light green; branching pinnate or palmate; oil bodies absent or large, mostly solitary or few per cell; plants often with ascending or erect thalli
Riccardia
Copyright 2006 Northwest Botanical Institute