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