The scientific classification of Pepperwort and Bidens 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 Bidens kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Pepperwort and Bidens family is a major factor of Pepperwort and Bidens 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 Bidens belongs to the family Asteraceae.
While comparing scientific classification, Pepperwort and Bidens genus and other classification are also important. Also, when you compare Pepperwort and Bidens, 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 Bidens. Pepperwort tribe is Lapidieae and Bidens tribe is Coreopsideae. Pepperwort clade is Angiosperms, Eudicots and Rosids and order is NA whereas Bidens clade is Angiosperms, Asterids and Eudicots and order is Asterales. Every plant have subfamilies. Pepperwort subfamilies are, NA and Bidens subfamilies are Asteroideae. In this way you can compare scientific classification of Pepperwort and Bidens and other products also.