The scientific classification of Oatgrass and Marchantia includes the entire classification chart that includes kingdom, family, clade, tribe etc. A kingdom is the second highest taxonomic rank. A taxonomic rank is the level that a living organisms are placed in hierarchical level of arrangement of life forms. All the living organisms are divided into kingdoms. Plant kingdom is a main classification of living organisms that include all plants. There are six kingdoms which are: Plantae, Animalia, Fungi, Protista, Aschaea/Archaeabacteria and Bacteria Eubacteria. Oatgrass and Marchantia kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Oatgrass and Marchantia family is a major factor of Oatgrass and Marchantia Scientific Classification. Plant family helps you narrow the search of your plants. It also gives you idea about, how the plant looks, how the seed will be like etc. These two plant families can be different or same. Oatgrass belongs to the family Poaceae and Marchantia belongs to the family Marchantiaceae.
While comparing scientific classification, Oatgrass and Marchantia genus and other classification are also important. Also, when you compare Oatgrass and Marchantia, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Danthonia and other plant's genus is Marchantia. Oatgrass tribe is Aveneae and Marchantia tribe is Not Available. Oatgrass clade is Angiosperms, Commelinids and Monocots and order is Poales whereas Marchantia clade is Not Available and order is Marchantiales. Every plant have subfamilies. Oatgrass subfamilies are, Danthonioideae and Marchantia subfamilies are Marchantioideae. In this way you can compare scientific classification of Oatgrass and Marchantia and other products also.