The scientific classification of Japanese primrose and Saguaro 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 Saguaro kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Japanese primrose and Saguaro family is a major factor of Japanese primrose and Saguaro 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 Saguaro belongs to the family Cactaceae.
While comparing scientific classification, Japanese primrose and Saguaro genus and other classification are also important. Also, when you compare Japanese primrose and Saguaro, 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 Carnegiea. Japanese primrose tribe is Onagreae and Saguaro tribe is Pachycereeae. Japanese primrose clade is Angiosperms, Eudicots and Rosids and order is Myrtales whereas Saguaro clade is Angiosperms, Core eudicots and Eudicots and order is Caryophyllales. Every plant have subfamilies. Japanese primrose subfamilies are, Onagroideae and Saguaro subfamilies are Cactoideae. In this way you can compare scientific classification of Japanese primrose and Saguaro and other products also.