Riccia vs. Marchantia — What's the Difference?

Riccia is a genus of liverworts in the order Marchantiales.These plants are small and thalloid, that is not differentiated into root, stem and leaf. Depending on species, the thallus may be strap-shaped and about 0.5 to 4 mm wide with dichotomous branches or may form rosettes or hemirosettes up to 3 cm in diameter, that may be gregarious and form intricate mats.The thallus is dorsiventrally differentiated.

Marchantia is a genus of liverworts in the family Marchantiaceae and the order Marchantiales. The thallus of Marchantia shows differentiation into two layers: an upper photosynthetic layer with a well-defined upper epidermis with pores and a lower storage layer.

The type genus of Marchantiaceae; liverworts that reproduce asexually by gemmae and have stalked antheridiophores.

Type genus of Marchantiaceae; liverworts that reproduce asexually by gemmae and have stalked antheridiophores