Guide to Liverworts of Oregon: Key to Genera 4
1b plants leafy > 3a leaves divided 1/2 or more > 4
Left: Ptilidium californicum, Iron Mountain, Lane County, Oregon. DHW 12/10/91; right: Ptilidium ciliare, Kenai Penin., Alaska. E. Berg s.n.
4a Basal portion of leaves laminar, above the base divided into lobes fringed with cilia.
Blepharostoma trichophyllum, Lane Co., Oregon. DHW 6759
4b Leaves divided to the base into several narrow segments, each segment mostly only 1 or 2cells wide.
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