The scientific classification of Black Ash and Douglas Fir 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. Black Ash and Douglas Fir kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Black Ash and Douglas Fir family is a major factor of Black Ash and Douglas Fir 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. Black Ash belongs to the family Oleaceae and Douglas Fir belongs to the family Pinaceae.
While comparing scientific classification, Black Ash and Douglas Fir genus and other classification are also important. Also, when you compare Black Ash and Douglas Fir, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Fraxinus and other plant's genus is Pseudotsuga. Black Ash tribe is Oleeae and Douglas Fir tribe is Not Available. Black Ash clade is Angiosperms, Asterids and Eudicots and order is Scrophulariales whereas Douglas Fir clade is Not Available and order is Pinales. Every plant have subfamilies. Black Ash subfamilies are, Not Available and Douglas Fir subfamilies are Not Available. In this way you can compare scientific classification of Black Ash and Douglas Fir and other products also.