The scientific classification of Gardenia and Celery 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 Celery kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Gardenia and Celery family is a major factor of Gardenia and Celery 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 Celery belongs to the family Apiaceae.
While comparing scientific classification, Gardenia and Celery genus and other classification are also important. Also, when you compare Gardenia and Celery, 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 Apium. Gardenia tribe is Gardenieae and Celery tribe is Apieae. Gardenia clade is Angiosperms, Asterids and Eudicots and order is Gentianales whereas Celery clade is Angiosperms, Asterids and Eudicots and order is Apiales. Every plant have subfamilies. Gardenia subfamilies are, Ixoroideae and Celery subfamilies are Apioideae. In this way you can compare scientific classification of Gardenia and Celery and other products also.