The scientific classification of Oleander and Dutch Iris 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. Oleander and Dutch Iris kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Oleander and Dutch Iris family is a major factor of Oleander and Dutch Iris 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. Oleander belongs to the family Apocynaceae and Dutch Iris belongs to the family Iridaceae.
While comparing scientific classification, Oleander and Dutch Iris genus and other classification are also important. Also, when you compare Oleander and Dutch Iris, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Nerium and other plant's genus is Iris. Oleander tribe is Wrightieae and Dutch Iris tribe is Irideae. Oleander clade is Angiosperms, Asterids and Eudicots and order is Gentianales whereas Dutch Iris clade is Angiosperms and Monocots and order is Asparagales. Every plant have subfamilies. Oleander subfamilies are, Apocynoideae and Hippocastanoideae and Dutch Iris subfamilies are Iridoideae. In this way you can compare scientific classification of Oleander and Dutch Iris and other products also.