Many leafy liverworts have two rows of leaves opposite one another, and a third row of smaller underleaves borne below. The liverwort here is viewed from below in a mix of transmitted and reflected light, showing the complex outline that can result from the shape and folding of the various leaves on the shoot.
A comparison of these liverwort pages with those dealing with mosses shows that I have much more work to do to make the character lists for liverworts more comprehensive. I've also noticed that their characters are more difficult to categorise into more or less mutually-exclusive groupings, compared to the case of mosses. This is perhaps in part a reflection of the distinct evolutionary trajectories taken by the mosses and the liverworts.