OED Definition (1): The science which treats of plants. (1)
Plant’s are probably the most important species on this planet. Without them it wouldn’t be long before almost every species on the planet became extinct. As well as that they form the basis for many of the advancements made in the field of pharmacology. Finally, and probably most importantly in this current period of human history, plant scientists are using new research methods to come up with ways to deal with the food crisis that is ever imminent. That’s alongside related topics like global warming, desertification and how products like rubber and paper are made.