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