Guide to Liverworts of Oregon: Key to Marchantia 2
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Marchantia 1b scale appendages dentate > Marchantia 2
Marchantia latifolia - Jackson County, Oregon. DHW 9987.
2a Margin of ventral scale appendage weakly dentate; upper surface of thallus with a discontinuous central stripe; at all elevations; often weedy in disturbed sites as well as widespread in natural habitats.
Marchantia latifolia
Marchantia alpestris, Left: Waldo Lake, Lane County, Oregon. DHW m0618. Right: Marys Peak, Benton Co., Oregon. DHW m1641.
2b Margin of ventral scale appendages strongly dentate; upper surface of thallus lacking a central stripe but sometimes entire upper surface quite dark; mostly in undisturbed habitats at middle to high elevations.
Marchantia alpestris