The scientific classification of Rhubarb and Lemon Verbena 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 Lemon Verbena kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Rhubarb and Lemon Verbena family is a major factor of Rhubarb and Lemon Verbena 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 Lemon Verbena belongs to the family Verbenaceae.
While comparing scientific classification, Rhubarb and Lemon Verbena genus and other classification are also important. Also, when you compare Rhubarb and Lemon Verbena, 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 Aloysia. Rhubarb tribe is Not Available and Lemon Verbena tribe is Not Available. Rhubarb clade is Angiosperms, Core eudicots and Eudicots and order is Caryophyllales whereas Lemon Verbena clade is Angiosperms, Asterids and Eudicots and order is Lamiales. Every plant have subfamilies. Rhubarb subfamilies are, Not Available and Lemon Verbena subfamilies are Not Available. In this way you can compare scientific classification of Rhubarb and Lemon Verbena and other products also.