The scientific classification of Petunia and Azalea 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 Azalea kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Petunia and Azalea family is a major factor of Petunia and Azalea 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 Azalea belongs to the family Ericaceae.
While comparing scientific classification, Petunia and Azalea genus and other classification are also important. Also, when you compare Petunia and Azalea, 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 Rhododendron. Petunia tribe is Not Available and Azalea tribe is Rhodoreae. Petunia clade is Angiosperms, Asterids and Eudicots and order is Solanales whereas Azalea clade is Angiosperms, Asterids and Eudicots and order is Ericales. Every plant have subfamilies. Petunia subfamilies are, Petunioideae and Azalea subfamilies are Ericoideae. In this way you can compare scientific classification of Petunia and Azalea and other products also.