The scientific classification of Arizona barrel cactus and Pencil 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. Arizona barrel cactus and Pencil Plant kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Arizona barrel cactus and Pencil Plant family is a major factor of Arizona barrel cactus and Pencil 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. Arizona barrel cactus belongs to the family Cactaceae and Pencil Plant belongs to the family Euphorbiaceae.
While comparing scientific classification, Arizona barrel cactus and Pencil Plant genus and other classification are also important. Also, when you compare Arizona barrel cactus and Pencil Plant, 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 Euphorbia. Arizona barrel cactus tribe is Cacteae and Pencil Plant tribe is Euphorbieae. Arizona barrel cactus clade is Angiosperms, Core eudicots and Eudicots and order is Caryophyllales whereas Pencil Plant clade is Angiosperms, Eudicots and Rosids and order is Euphorbiales. Every plant have subfamilies. Arizona barrel cactus subfamilies are, Cactoideae and Pencil Plant subfamilies are Euphorbioideae. In this way you can compare scientific classification of Arizona barrel cactus and Pencil Plant and other products also.