The scientific classification of Bottle Tree and Old Man Cactus 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. Bottle Tree and Old Man Cactus kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Bottle Tree and Old Man Cactus family is a major factor of Bottle Tree and Old Man Cactus 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. Bottle Tree belongs to the family Sterculiaceae and Old Man Cactus belongs to the family Cactaceae.
While comparing scientific classification, Bottle Tree and Old Man Cactus genus and other classification are also important. Also, when you compare Bottle Tree and Old Man Cactus, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is brachychiton and other plant's genus is Cephalocereus. Bottle Tree tribe is Sterculieae and Old Man Cactus tribe is Pachycereeae. Bottle Tree clade is Angiosperms, Eudicots and Rosids and order is Malvales whereas Old Man Cactus clade is Angiosperms, Core eudicots and Eudicots and order is Caryophyllales. Every plant have subfamilies. Bottle Tree subfamilies are, Sterculioideae and Old Man Cactus subfamilies are Cactoideae. In this way you can compare scientific classification of Bottle Tree and Old Man Cactus and other products also.