Guide to Liverworts of Oregon: Key to Genera 56
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 bilobed > 37b if rhizoids red, stems red > 38a shoots wider than 1 mm > 39b underleaves inconspicuous > 55a leaves transverse > 56
Tritomaria exsecta, shoot tip with gemmae. Crane Creek watershed, Grant County. A.Hardman 6000.
56a Leaves extremely asymmetrical, 2-3-lobed, usually with a slender, divergent lobe 2/3 up the dorsal margin; usually with masses of reddish-brown gemmae at shoot apex
Tritomaria
Marsupella bolanderi, Monterey Co., California. DHW m1230
56b Leaves rather evenly bilobed; with reddish-scarlet gemmae or gemmae absent
(Couplet 57)
Copyright 2006 Northwest Botanical Institute