Peter Raven 

One of the Great botanists of the 20th century.  Carrying the torch of Hugh Iltis, in this timely perspective.

http://dotearth.blogs.nytimes.com/2016/03/16/while-they-were-shouting-a-botanists-lament-about-presidential-politics/?smprod=nytcore-iphone&smid=nytcore-iphone-share-lament-about-presidential-politics/?smprod=nytcore-iphone&smid=nytcore-iphone-share