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