The scientific classification of Oatgrass and Ostrich Fern 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 Ostrich Fern kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Oatgrass and Ostrich Fern family is a major factor of Oatgrass and Ostrich Fern 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 Ostrich Fern belongs to the family Dryopteridaceae.
While comparing scientific classification, Oatgrass and Ostrich Fern genus and other classification are also important. Also, when you compare Oatgrass and Ostrich Fern, 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 Matteuccia. Oatgrass tribe is Aveneae and Ostrich Fern tribe is Not Available. Oatgrass clade is Angiosperms, Commelinids and Monocots and order is Poales whereas Ostrich Fern clade is Not Available and order is Polypodiales. Every plant have subfamilies. Oatgrass subfamilies are, Danthonioideae and Ostrich Fern subfamilies are Not Available. In this way you can compare scientific classification of Oatgrass and Ostrich Fern and other products also.