Guide to Liverworts of Oregon: Key to Genera 39
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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 > 39
Lophocolea bidentata phenotype, Berkeley Botanical Garden, Alameda Co., California. DHW 3xxx.
39a Underleaves regularly developed and quite distinct on sterile shoots; however, sometimes difficult to find because they are soon eroded or lost among rhizoids.
(Couplet 40)
Gymnocolea inflata, North Bend Ranger district, Washington. Lesher 1590.
39b Underleaves lacking or inconspicuous on sterile shoots.
(Couplet 55)