I've long seen plants and trees as 'upside-down' beings. Their real realm of existence - where their 'brain', if you will, is located - is below ground in the roots and soil, while they just send stems, leaves and flowers up into the atmosphere to breathe, obtain energy for metabolism, and breed. A related article on the BBC site describes tree species which are almost entirely underground (http://www.bbc.com/earth/story/20141103-why-some-trees-live-underground) - a phenomenon I did not know about previously, but which supports my heterodox view of woody plant life.