The scientific classification of Hyacinth and Crown-of-Thorns 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. Hyacinth and Crown-of-Thorns kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Hyacinth and Crown-of-Thorns family is a major factor of Hyacinth and Crown-of-Thorns 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. Hyacinth belongs to the family Liliaceae and Crown-of-Thorns belongs to the family Euphorbiaceae.
While comparing scientific classification, Hyacinth and Crown-of-Thorns genus and other classification are also important. Also, when you compare Hyacinth and Crown-of-Thorns, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Hyacinthus and other plant's genus is Euphorbia. Hyacinth tribe is Not Available and Crown-of-Thorns tribe is Euphorbieae. Hyacinth clade is Angiosperms and Monocots and order is Liliales whereas Crown-of-Thorns clade is Angiosperms, Eudicots and Rosids and order is Euphorbiales. Every plant have subfamilies. Hyacinth subfamilies are, Scilloideae and Crown-of-Thorns subfamilies are Euphorbioideae. In this way you can compare scientific classification of Hyacinth and Crown-of-Thorns and other products also.