The scientific classification of Rose and Duckweed 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. Rose and Duckweed kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Rose and Duckweed family is a major factor of Rose and Duckweed 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. Rose belongs to the family Rosaceae and Duckweed belongs to the family Lemnaceae.
While comparing scientific classification, Rose and Duckweed genus and other classification are also important. Also, when you compare Rose and Duckweed, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Rosa and other plant's genus is Lemna. Rose tribe is Not Available and Duckweed tribe is Lemneae. Rose clade is Angiosperms, Eudicots and Rosids and order is Rosales whereas Duckweed clade is Angiosperms and Monocots and order is Arales. Every plant have subfamilies. Rose subfamilies are, Rosoideae and Duckweed subfamilies are Lemnoideae. In this way you can compare scientific classification of Rose and Duckweed and other products also.