The scientific classification of Pepperwort and Musk Thistle 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. Pepperwort and Musk Thistle kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Pepperwort and Musk Thistle family is a major factor of Pepperwort and Musk Thistle 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. Pepperwort belongs to the family Marsileaceae and Musk Thistle belongs to the family Asteraceae.
While comparing scientific classification, Pepperwort and Musk Thistle genus and other classification are also important. Also, when you compare Pepperwort and Musk Thistle, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Marsilea and other plant's genus is Carduus. Pepperwort tribe is Lapidieae and Musk Thistle tribe is Cynareae. Pepperwort clade is Angiosperms, Eudicots and Rosids and order is NA whereas Musk Thistle clade is Angiosperms, Asterids and Eudicots and order is Asterales. Every plant have subfamilies. Pepperwort subfamilies are, NA and Musk Thistle subfamilies are Carduoideae. In this way you can compare scientific classification of Pepperwort and Musk Thistle and other products also.