Riccia nigrescens

Riccia nigrescens is a species in the genus Riccia, belonging to the family Ricciaceae. It was first described by Mont. in 1839.

Related species

Riccia sarieae

Riccia anatolica

Riccia boumanii

Riccia rhenana

Riccia vitalii

Riccia squamata

Oxymitra cristata

Oxymitra incrassata

Ricciocarpos natans