The scientific classification of Petunia and St. Augustine Grass 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. Petunia and St. Augustine Grass kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Petunia and St. Augustine Grass family is a major factor of Petunia and St. Augustine Grass 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. Petunia belongs to the family Solanaceae and St. Augustine Grass belongs to the family Poaceae.
While comparing scientific classification, Petunia and St. Augustine Grass genus and other classification are also important. Also, when you compare Petunia and St. Augustine Grass, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Petunia and other plant's genus is Stenotaphrum. Petunia tribe is Not Available and St. Augustine Grass tribe is Paniceae. Petunia clade is Angiosperms, Asterids and Eudicots and order is Solanales whereas St. Augustine Grass clade is Angiosperms, Commelinids and Monocots and order is Cyperales. Every plant have subfamilies. Petunia subfamilies are, Petunioideae and St. Augustine Grass subfamilies are Panicoideae. In this way you can compare scientific classification of Petunia and St. Augustine Grass and other products also.