The scientific classification of Giant Reed and Echinocactus 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. Giant Reed and Echinocactus kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Giant Reed and Echinocactus family is a major factor of Giant Reed and Echinocactus 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. Giant Reed belongs to the family Poaceae and Echinocactus belongs to the family Cactaceae.
While comparing scientific classification, Giant Reed and Echinocactus genus and other classification are also important. Also, when you compare Giant Reed and Echinocactus, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Arundo and other plant's genus is Echinocactus. Giant Reed tribe is Not Available and Echinocactus tribe is Cacteae. Giant Reed clade is Commelinids and order is Cyperales whereas Echinocactus clade is Angiosperms, Core eudicots and Eudicots and order is Caryophyllales. Every plant have subfamilies. Giant Reed subfamilies are, Not Available and Echinocactus subfamilies are Cactoideae. In this way you can compare scientific classification of Giant Reed and Echinocactus and other products also.