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