The scientific classification of Sand Dollar Cactus and Cleistocactus 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. Sand Dollar Cactus and Cleistocactus kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Sand Dollar Cactus and Cleistocactus family is a major factor of Sand Dollar Cactus and Cleistocactus 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. Sand Dollar Cactus belongs to the family Cactaceae and Cleistocactus belongs to the family Cactaceae.
While comparing scientific classification, Sand Dollar Cactus and Cleistocactus genus and other classification are also important. Also, when you compare Sand Dollar Cactus and Cleistocactus, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Astrophytum and other plant's genus is Cleistocactus. Sand Dollar Cactus tribe is Cacteae and Cleistocactus tribe is Trichocereeae. Sand Dollar Cactus clade is Angiosperms, Core eudicots and Eudicots and order is Caryophyllales whereas Cleistocactus clade is Angiosperms, Core eudicots and Eudicots and order is Caryophyllales. Every plant have subfamilies. Sand Dollar Cactus subfamilies are, Cactoideae and Cleistocactus subfamilies are Cactoideae. In this way you can compare scientific classification of Sand Dollar Cactus and Cleistocactus and other products also.