The scientific classification of River Birch and Astilbe 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. River Birch and Astilbe kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. River Birch and Astilbe family is a major factor of River Birch and Astilbe 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. River Birch belongs to the family Betulaceae and Astilbe belongs to the family Saxifragaceae.
While comparing scientific classification, River Birch and Astilbe genus and other classification are also important. Also, when you compare River Birch and Astilbe, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Betula and other plant's genus is Astilbe. River Birch tribe is Not Available and Astilbe tribe is Not Available. River Birch clade is Angiosperms, Eudicots and Rosids and order is Fagales whereas Astilbe clade is Angiosperms, Core eudicots and Eudicots and order is Rosales. Every plant have subfamilies. River Birch subfamilies are, Not Available and Astilbe subfamilies are Not Available. In this way you can compare scientific classification of River Birch and Astilbe and other products also.