Marchantia polymorpha (Common Liverwort) is a species of liverworts in the family Marchantiaceae. They are native to United States, Santa Catarina, Mata AtlâNtica, Rio Grande Do Sul, and Rio De Janeiro.
Definition: Organic matter in soil which has reached a point of stability, where it will break down no further and might, if conditions do not change, remain essentially as it is for centuries, or millennia.
Definition: The institution that holds a type specimen for a given species. The recommended best practice is to use the identifier in a collections registry such as the Biodiversity Collections Index (http://www.biodiversitycollectionsindex.org/).