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