The scientific classification of Barley and Orange 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. Barley and Orange kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Barley and Orange family is a major factor of Barley and Orange 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. Barley belongs to the family Poaceae and Orange belongs to the family Rutaceae.
While comparing scientific classification, Barley and Orange genus and other classification are also important. Also, when you compare Barley and Orange, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Hordeum and other plant's genus is Citrus. Barley tribe is Triticeae and Orange tribe is Citreae. Barley clade is Angiosperms, Commelinids and Monocots and order is Cyperales whereas Orange clade is Angiosperms, Eudicots and Rosids and order is Sapindales. Every plant have subfamilies. Barley subfamilies are, Pooideae and Orange subfamilies are Aurantioideae. In this way you can compare scientific classification of Barley and Orange and other products also.