The scientific classification of Japanese Stewartia and Ninebark 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. Japanese Stewartia and Ninebark kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Japanese Stewartia and Ninebark family is a major factor of Japanese Stewartia and Ninebark 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. Japanese Stewartia belongs to the family Theaceae and Ninebark belongs to the family Rosaceae.
While comparing scientific classification, Japanese Stewartia and Ninebark genus and other classification are also important. Also, when you compare Japanese Stewartia and Ninebark, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Stewartia and other plant's genus is Physocarpus. Japanese Stewartia tribe is Not Available and Ninebark tribe is Neillieae. Japanese Stewartia clade is Angiosperms, Asterids and Eudicots and order is Ericales whereas Ninebark clade is Angiosperms, Eudicots and Rosids and order is Rosales. Every plant have subfamilies. Japanese Stewartia subfamilies are, Not Available and Ninebark subfamilies are Amygdaloideae. In this way you can compare scientific classification of Japanese Stewartia and Ninebark and other products also.