The scientific classification of Crossandra and Allamanda 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. Crossandra and Allamanda kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Crossandra and Allamanda family is a major factor of Crossandra and Allamanda 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. Crossandra belongs to the family Acanthaceae and Allamanda belongs to the family Apocynaceae.
While comparing scientific classification, Crossandra and Allamanda genus and other classification are also important. Also, when you compare Crossandra and Allamanda, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Crossandra and other plant's genus is Allamanda. Crossandra tribe is Not Available and Allamanda tribe is Apocyneae. Crossandra clade is Angiosperms, Asterids and Eudicots and order is Scrophulariales whereas Allamanda clade is Angiosperms, Asterids and Eudicots and order is Gentianales. Every plant have subfamilies. Crossandra subfamilies are, Not Available and Allamanda subfamilies are Rauvolfioideae. In this way you can compare scientific classification of Crossandra and Allamanda and other products also.