The scientific classification of Oatgrass and Elkhorn 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 Elkhorn kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Oatgrass and Elkhorn family is a major factor of Oatgrass and Elkhorn 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 Elkhorn belongs to the family Euphorbiaceae.
While comparing scientific classification, Oatgrass and Elkhorn genus and other classification are also important. Also, when you compare Oatgrass and Elkhorn, 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 Euphorbia. Oatgrass tribe is Aveneae and Elkhorn tribe is Euphorbieae. Oatgrass clade is Angiosperms, Commelinids and Monocots and order is Poales whereas Elkhorn clade is Angiosperms, Eudicots and Rosids and order is Malpighiales. Every plant have subfamilies. Oatgrass subfamilies are, Danthonioideae and Elkhorn subfamilies are Euphorbioideae. In this way you can compare scientific classification of Oatgrass and Elkhorn and other products also.