The scientific classification of Adam's Needle and Hairy Vetch 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. Adam's Needle and Hairy Vetch kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Adam's Needle and Hairy Vetch family is a major factor of Adam's Needle and Hairy Vetch 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. Adam's Needle belongs to the family Agavaceae and Hairy Vetch belongs to the family Fabaceae.
While comparing scientific classification, Adam's Needle and Hairy Vetch genus and other classification are also important. Also, when you compare Adam's Needle and Hairy Vetch, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Yucca and other plant's genus is Vicia. Adam's Needle tribe is Not Available and Hairy Vetch tribe is Vicieae. Adam's Needle clade is Angiosperms and Monocots and order is Liliales whereas Hairy Vetch clade is Angiosperms, Eudicots and Rosids and order is Fabales. Every plant have subfamilies. Adam's Needle subfamilies are, Agavoideae and Hairy Vetch subfamilies are Faboideae. In this way you can compare scientific classification of Adam's Needle and Hairy Vetch and other products also.