The scientific classification of Celery and White Onion 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. Celery and White Onion kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Celery and White Onion family is a major factor of Celery and White Onion 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. Celery belongs to the family Apiaceae and White Onion belongs to the family Liliaceae.
While comparing scientific classification, Celery and White Onion genus and other classification are also important. Also, when you compare Celery and White Onion, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Apium and other plant's genus is Allium. Celery tribe is Apieae and White Onion tribe is Allieae. Celery clade is Angiosperms, Asterids and Eudicots and order is Apiales whereas White Onion clade is Angiosperms and Monocots and order is Asparagales. Every plant have subfamilies. Celery subfamilies are, Apioideae and White Onion subfamilies are Allioideae. In this way you can compare scientific classification of Celery and White Onion and other products also.