The scientific classification of Gardenia and Acacia 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. Gardenia and Acacia kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Gardenia and Acacia family is a major factor of Gardenia and Acacia 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. Gardenia belongs to the family Rubiaceae and Acacia belongs to the family Fabaceae.
While comparing scientific classification, Gardenia and Acacia genus and other classification are also important. Also, when you compare Gardenia and Acacia, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Gardenia and other plant's genus is Acacia. Gardenia tribe is Gardenieae and Acacia tribe is Acacieae. Gardenia clade is Angiosperms, Asterids and Eudicots and order is Gentianales whereas Acacia clade is Not Available and order is Fabales. Every plant have subfamilies. Gardenia subfamilies are, Ixoroideae and Acacia subfamilies are Mimosoideae. In this way you can compare scientific classification of Gardenia and Acacia and other products also.