Guide to Liverworts of Oregon: Key to Genera 12
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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 > 12
CAUTION: the distinction between these leads is not sharply defined. If a plant sits on a borderline between leaves retuse or emarginate and leaves shallowly lobed, it is usually best to try lead 12b first. Lead 12a is designed to pull out those species bearing leaves with predominantly round apices.
Left: Jungermannia rubra (juvenile shoot), Lane Co., Oregon. DHW 7761. Right: Gyrothyra underwoodiana, South Slough, Coos Co., Oregon. DHW m2428a.
12a Leaves round to ovate, some species with occasional leaves or shoot segments retuse or emarginate, some with
wavy or minutely dentate margins
(Couplet 28)
Left: Chiloscyphus coadunatus, Coos Co., Oregon. DHW 9330. Right: Jamesoniella cf. autumnalis heterostipa, Waldo Lake, Lane County, Oregon. DHW m0736.
12b Leaves regularly to consistently lobed (leaf tip notched); the sinus (notch) between the lobes shallow to deep, acute to rounded;
the leaf lobes round to pointed, equal to quite unequal
(Couplet 37)