Guide to Liverworts of Oregon: Tritomaria exsecta (Schmid.) Schiffn.
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Tritomaria 1b gemmae frequent, leaves not undulate > Tritomaria 2a gemmae ellipsoid >
Synonym: None.
Special Status: ORBIC List 2.
Recognition: Asymmetrical, 2-lobed leaves with the dorsal lobe fingerlike; masses of reddish brown, ovoid gemmae on lobe tips. This species is separated from Tritomaria exsectiformis on the basis of smaller cells and having rounded instead of angular gemmae.
Distribution: Grows on organic substrates, typically compacted decomposing litter, rotting wood, sometimes humus over rocks, where perpetually shady, cool, and moist. Found in NE Washington (Hong 1994) but report from Oregon in Christy and Wagner (1996) is apparently erroneous. Grant County: Crane Creek watershed. A. Hardman 6000 (OSC).
Comments: As expected, found in Oregon but only recently.
Tritomaria exsecta, shoot tip with gemmae. Crane Creek watershed, Grant County. A.Hardman 6000.
Tritomaria exsecta, lobe tips with gemmae. Crane Creek watershed, Grant County. A.Hardman 6000.
Tritomaria exsecta, leaf cells with oil bodies. Crane Creek watershed, Grant County. A.Hardman 6000.