The scientific classification of Raoulia and Joshua Tree 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. Raoulia and Joshua Tree kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Raoulia and Joshua Tree family is a major factor of Raoulia and Joshua Tree 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. Raoulia belongs to the family Asteraceae and Joshua Tree belongs to the family Agavaceae.
While comparing scientific classification, Raoulia and Joshua Tree genus and other classification are also important. Also, when you compare Raoulia and Joshua Tree, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Raoulia and other plant's genus is Yucca. Raoulia tribe is Gnaphalieae and Joshua Tree tribe is Not Available. Raoulia clade is Angiosperms, Asterids and Eudicots and order is Asterales whereas Joshua Tree clade is Angiosperms and Monocots and order is Asparagales. Every plant have subfamilies. Raoulia subfamilies are, Not Available and Joshua Tree subfamilies are Not Available. In this way you can compare scientific classification of Raoulia and Joshua Tree and other products also.