Guide to Liverworts of Oregon: Key to Bazzania 1
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1b plants leafy > 3b leaves not divided, not ciliate > 6a oil bodies 2+ or unknown > 7b no small dorsal lobe > 10b leaves incubous > 20b lobule absent > 23b lobule absent > 24b leaves 2-3 dentate > Bazzania
Left: Leaf. Right: cells with oilbodies. Klaloch, Jefferson Co., Washington. DHW
m1105
1a Leaves and underleaves persistent; leaves sharply, asymmetrically 1-2 or, more typically, 2-3 dentate; oil bodies 2-4 (5) per cell, spherical, glistening, 6-7mm
Bazzania tricrenata
Left: shoot tip. Butte Creek Falls, Marion County, Oregon. DHW m1852. Middle: leaf; right: cells with oilbodies. Klaloch, Jefferson Co., Washington. DHW m1104b.
1b Leaves and underleaves caducous, at least some short stem-segments naked; either leaves predominantly bidentate or oil bodies more numerous
(Couplet 2)