Plants use to be classified by the appearance, either monocotyledons (single seeded leaf) or dicotyledons (two seed leaves/broad leaves)
Team of scienctits- kew- recently devised a new classification of the families of flowering plants. This was based on the DNA sequences of the three genes found in all plants.
- They used 565 species that between them, represented all of the known families of flowering plants in the world.
- For each plant, the DNA sequences of all three genes was determined
- The sequences for each species were compared using computer analysis
- A phylogenetic tree for the families of flowering plants was devised based upon the DNA sequences of the species
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