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