The scientific classification of Rose and Cereus 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. Rose and Cereus kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Rose and Cereus family is a major factor of Rose and Cereus 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. Rose belongs to the family Rosaceae and Cereus belongs to the family Cactaceae.
While comparing scientific classification, Rose and Cereus genus and other classification are also important. Also, when you compare Rose and Cereus, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Rosa and other plant's genus is Selenicereus. Rose tribe is Not Available and Cereus tribe is Hylocereeae. Rose clade is Angiosperms, Eudicots and Rosids and order is Rosales whereas Cereus clade is Angiosperms, Core eudicots and Eudicots and order is Caryophyllales. Every plant have subfamilies. Rose subfamilies are, Rosoideae and Cereus subfamilies are Cactoideae. In this way you can compare scientific classification of Rose and Cereus and other products also.