Guide to Liverworts of Oregon: Key to Genera 37
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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 > 37
Left: Fossombronia sp., Douglas Co., Oregon. DHW 6782a. Right: Fossombronia pusilla, Spencer Butte, Lane Co., Oregon. DHW m1519.
37a Rhizoids bright purplish-red, always abundant; stem and leaves pure green; leaves mostly
quadrate, with wavy or ruffled margins, appearing irregularly lobed
Fossombronia
Chiloscyphus coadunatus, Coos Co., Oregon. DHW 9330
37b Rhizoids usually colorless or brownish, if reddish then stems and/or leaf bases also reddish;
rhizoids sometimes scarce; leaves distinctly and regularly lobed
(Couplet 38)