Kingdom: Plantae
Phylum: Marchantiophyta
Class: Marchantiopsida (Complex Thalloid Liverworts)

Marchantiopsida are characterised as being complex thalloid liverworts. They have a global distribution and commonly occur on moist earth or mud. A few species grow in water. The gametophore of species in this class is always thallose. The thallus, which is generally several cells thick, typically exhibits dichotomous branching. The differentiated tissues of the thallus is the reason species in this class are termed "complex thalloid liverworts", and it distinguishes them from the simple thalloid liverworts of the class Jungermanniopsida.