The scientific classification of Bishop's Cap Cactus and Foxtail Barley 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. Bishop's Cap Cactus and Foxtail Barley kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Bishop's Cap Cactus and Foxtail Barley family is a major factor of Bishop's Cap Cactus and Foxtail Barley 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. Bishop's Cap Cactus belongs to the family Cactaceae and Foxtail Barley belongs to the family Poaceae.
While comparing scientific classification, Bishop's Cap Cactus and Foxtail Barley genus and other classification are also important. Also, when you compare Bishop's Cap Cactus and Foxtail Barley, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Astrophytum and other plant's genus is Hordeum. Bishop's Cap Cactus tribe is Cacteae and Foxtail Barley tribe is Hordeeae. Bishop's Cap Cactus clade is Angiosperms, Core eudicots and Eudicots and order is Caryophyllales whereas Foxtail Barley clade is Angiosperms, Commelinids and Monocots and order is Cyperales. Every plant have subfamilies. Bishop's Cap Cactus subfamilies are, Cactoideae and Foxtail Barley subfamilies are Pooideae. In this way you can compare scientific classification of Bishop's Cap Cactus and Foxtail Barley and other products also.