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