Mannia triandra
- kingdom: Plantae
- phylum: Marchantiophyta
- class: Marchantiopsida
- order: Marchantiales
- family: Aytoniaceae
- genus: Mannia
- species: Mannia triandra
Sierning
Upper Austria
AustriaBelleville
Ontario
CanadaLemont
Port Byron
IllinoisLe Claire
IowaNashville
TennesseeBrandon
Vermont
United States