The complexity of life.

Living things are always complex structures. This is a slice through a Brassica tuber showing its complicated anatomy. 

Language is equally complex:
In Southern England Brassica rapa is known as a turnip but in Scotland it is called a swede (short for Swedish turnip).
Brassica napus on the other hand is known as a swede in Southern England but in Scotland as a yellow turnip or neep.
It is for such reasons that biologists prefer to use scientific names which remain the same wherever you find yourself.

The slice is from a Scottish neep.