Guide to Liverworts of Oregon: Key to Genera 57
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1b plants leafy > 3b leaves not divided, not ciliate > 6a oil bodies 2+ or unknown > 7b no small dorsal lobe > 10a succubous > 11a anisophyllous > 12b leaves lobed > 37b if rhizoids red, stems red > 38a shoots wider than 1 mm > 39b underleaves inconspicuous > 55a leaves transverse > 56b leaf lobes equal > 57
Mystery Hills, Kenai National Wildlife Refuge, Alaska. Ed Berg B091
57a Leaf cell walls evenly thickened or (A. sphenoloboides) with coarse trigones; gemmae frequent, reddish-scarlet; oil bodies 3-5 per cell, composed of distinct spherules; midmontane to alpine
Anastrophyllum
Monterey Co., California. DHW m1230.
57b Leaf cells with distinct, usually bulging trigones; gemmae absent; oil bodies rarely more than 2-3 per cell, finely granulose or lumpy-amorphous; widespread
Marsupella