The scientific classification of Red Pitaya and Devil's Tongue 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. Red Pitaya and Devil's Tongue kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Red Pitaya and Devil's Tongue family is a major factor of Red Pitaya and Devil's Tongue 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. Red Pitaya belongs to the family Cactaceae and Devil's Tongue belongs to the family Araceae.
While comparing scientific classification, Red Pitaya and Devil's Tongue genus and other classification are also important. Also, when you compare Red Pitaya and Devil's Tongue, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Hylocereus and other plant's genus is Amorphophallus. Red Pitaya tribe is Cacteae and Devil's Tongue tribe is Thomsonieae. Red Pitaya clade is Angiosperms, Core eudicots and Eudicots and order is Caryophyllales whereas Devil's Tongue clade is Angiosperms and Monocots and order is Alismatales. Every plant have subfamilies. Red Pitaya subfamilies are, Cactoideae and Devil's Tongue subfamilies are Aroideae. In this way you can compare scientific classification of Red Pitaya and Devil's Tongue and other products also.