Jungermanniaceae.

Plants small or more often large. Stems little branched (in New Zealand plants). Leaves succubous to transversely inserted, entire or 2-lobed. Cauline stipules generally absent. Perianth terminal, cylindrical or ovate, plicate.

The following descriptions of the genera are adapted from The Students' Handbook of British Hepatics, by S. M. MacVicar, and Tasmanian Bryophyta, vol. ii, by L. Rodway.