Haplomitriales (formerly Calobryales)'s an order of plants known as liverworts. The order's also called Calobryales in some sources, but the genus Calobryum's a synonym for Haplomitrium. This order contains one family, Haplomitriaceae, with a single extant genus Haplomitrium. Species of Haplomitriales Gessella, Poulsen (a fossil) Haplomitrium cooperi, Nees. Haplomitrium scalia, Nees.… (More on Haplomitriales)