The scientific classification of Cowpea and Lamb's Lettuce 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. Cowpea and Lamb's Lettuce kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Cowpea and Lamb's Lettuce family is a major factor of Cowpea and Lamb's Lettuce 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. Cowpea belongs to the family Fabaceae and Lamb's Lettuce belongs to the family Valerianaceae.
While comparing scientific classification, Cowpea and Lamb's Lettuce genus and other classification are also important. Also, when you compare Cowpea and Lamb's Lettuce, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Vigna and other plant's genus is Valerianella. Cowpea tribe is Not Available and Lamb's Lettuce tribe is Valerianeae. Cowpea clade is Angiosperms, Eudicots and Rosids and order is Fabales whereas Lamb's Lettuce clade is Angiosperms, Asterids and Eudicots and order is Dipsacales. Every plant have subfamilies. Cowpea subfamilies are, Not Available and Lamb's Lettuce subfamilies are Valerianoideae. In this way you can compare scientific classification of Cowpea and Lamb's Lettuce and other products also.