The scientific classification of Cholla and Iris 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. Cholla and Iris kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Cholla and Iris family is a major factor of Cholla and Iris 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. Cholla belongs to the family Cactaceae and Iris belongs to the family Iridaceae.
While comparing scientific classification, Cholla and Iris genus and other classification are also important. Also, when you compare Cholla and Iris, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Tephrocactus and other plant's genus is Iris. Cholla tribe is Cylindropuntieae and Iris tribe is Irideae. Cholla clade is Angiosperms and Eudicots and order is Caryophyllales whereas Iris clade is Angiosperms and Monocots and order is Asparagales. Every plant have subfamilies. Cholla subfamilies are, Opuntioideae and Iris subfamilies are Iridoideae. In this way you can compare scientific classification of Cholla and Iris and other products also.