The scientific classification of Tree-of-Heaven and Australian Tree Fern 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. Tree-of-Heaven and Australian Tree Fern kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Tree-of-Heaven and Australian Tree Fern family is a major factor of Tree-of-Heaven and Australian Tree Fern 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. Tree-of-Heaven belongs to the family Simaroubaceae and Australian Tree Fern belongs to the family Cyatheaceae.
While comparing scientific classification, Tree-of-Heaven and Australian Tree Fern genus and other classification are also important. Also, when you compare Tree-of-Heaven and Australian Tree Fern, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Ailanthus and other plant's genus is Cyathea. Tree-of-Heaven tribe is Not Available and Australian Tree Fern tribe is Not Available. Tree-of-Heaven clade is Angiosperms, Eudicots and Rosids and order is Sapindales whereas Australian Tree Fern clade is Not Available and order is Cyatheales. Every plant have subfamilies. Tree-of-Heaven subfamilies are, Not Available and Australian Tree Fern subfamilies are Not Available. In this way you can compare scientific classification of Tree-of-Heaven and Australian Tree Fern and other products also.