The scientific classification of Arizona barrel cactus and Oatgrass 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. Arizona barrel cactus and Oatgrass kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Arizona barrel cactus and Oatgrass family is a major factor of Arizona barrel cactus and Oatgrass 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. Arizona barrel cactus belongs to the family Cactaceae and Oatgrass belongs to the family Poaceae.
While comparing scientific classification, Arizona barrel cactus and Oatgrass genus and other classification are also important. Also, when you compare Arizona barrel cactus and Oatgrass, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Ferocactus and other plant's genus is Danthonia. Arizona barrel cactus tribe is Cacteae and Oatgrass tribe is Aveneae. Arizona barrel cactus clade is Angiosperms, Core eudicots and Eudicots and order is Caryophyllales whereas Oatgrass clade is Angiosperms, Commelinids and Monocots and order is Poales. Every plant have subfamilies. Arizona barrel cactus subfamilies are, Cactoideae and Oatgrass subfamilies are Danthonioideae. In this way you can compare scientific classification of Arizona barrel cactus and Oatgrass and other products also.