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