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