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