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