The scientific classification of Rhododendron and Firethorn 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. Rhododendron and Firethorn kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Rhododendron and Firethorn family is a major factor of Rhododendron and Firethorn 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. Rhododendron belongs to the family Ericaceae and Firethorn belongs to the family Rosaceae.
While comparing scientific classification, Rhododendron and Firethorn genus and other classification are also important. Also, when you compare Rhododendron and Firethorn, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Rhododendron and other plant's genus is Pyracantha. Rhododendron tribe is Rhodoreae and Firethorn tribe is Maleae. Rhododendron clade is Angiosperms, Asterids and Eudicots and order is Ericales whereas Firethorn clade is Angiosperms, Eudicots and Rosids and order is Rosales. Every plant have subfamilies. Rhododendron subfamilies are, Ericoideae and Firethorn subfamilies are Amygdaloideae. In this way you can compare scientific classification of Rhododendron and Firethorn and other products also.