Guide to Liverworts of Oregon: Bazzania denudata (Torr.) Trev.
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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 1b caducous leaves present > Bazzania 2b oil bodies 8-12 > Bazzania denudata
Synonym: None.
Special status: None.
Recognition: Oil bodies generally cylindrical, 8-14 per cell, clear, glistening; lateral margins of underleaves sinuose or irregular; stem cells elongate, usually more than 2:1 (length:width); caducous leaves evident, always pure, light green. Toothing of leaf tip extremely variable, but frequently 3-dentate.
Distribution: On logs and rotting wood; western Oregon, more common along the coast, more common northwards; circumboreal.
Comments: Hong (1978) cites Miller & Shushan (1964) for his placing of this in the state flora. Schuster (1969) reports it from Washington, not Oregon. See B.ambigua and Schofield's comments (1968). Hong (Evansia, 1989) points out underleaf and stem cell characters that distinguish this from B.ambigua (see discussion under that).
Haida Gwaii, British Columbia, Canada. D. Callaghan. 28 May 2023.
Shoots with caducous leaves. Butte Creek Falls, Marion County, Oregon. DHW m1852.
Colony on Thuja plicata. Sweet Creek Falls, Lane County, Oregon. DHW m3059.
Leaf. Klaloch, Jefferson Co., Washington. DHW m1104b.
Underleaf. Klaloch, Jefferson Co., Washington. DHW m1104b.
Cells with oilbodies. Left: Klaloch, Jefferson Co., Washington. DHW m1104b. Middle and right: Sweet Creek, Lane County, Oregon. DHW m3059
Leaves. South Slough, Coos Co., Oregon. DHW m1582
Underleaves. South Slough, Coos Co., Oregon. DHW m1582
Oilbodies. South Slough, Coos Co., Oregon. DHW m1582