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