What is Peter H. Raven?
{{Infobox scientist | name = Peter Raven | birth_name = Peter Hamilton Raven | image = Peter Raven smiling, October 16, 2007.jpg | caption = Peter Raven, after receiving the [[Addison Emery Verrill Medal]] | birth_date = {{b-da|June 13, 1936}} | birth_place = [[Shanghai]], China | death_date = | death_place = | spouse = {{marriage|Sally Barrett|1958|1968|reason=her death}}<br />{{marriage|Tamra Engelhorn|1968|1995|reason=divorced}}<br />{{marriage|Kathryn Fish|1996|2000|reason=divorced}}<br />{{marriage|Patricia Duncan|2001}} | children = 4 | nationality = American | fields = [[Botany]], [[Evolutionary biology]], [[Biodiversity]] | alma_mater = [[University of California, Berkeley]],<br />[[University of California, Los Angeles]] | work_institutions = [[Stanford University]],<br />[[Missouri Botanical Garden]]<br /> [[Washington University in St. Louis]] | doctoral_advisor = | doctoral_students = [[Dennis E. Breedlove]]<br>[[Warren L. Wagner]] | known_for = | societies = | prizes = [[International Prize for Biology]] {{small|(1986)}}<br />[[Volvo Environment Prize]] {{small|(1992)}}<br />[[Tyler Prize for Environmental Achievement]] {{small|(1994)}}<br />[[AAAS Philip Hauge Abelson Prize]] <small>(1997)</small><br />[[International Cosmos Prize]] {{small|(2003)}}<br />[[ANZAAS Medal]] {{small|(2004)}}<br />[[Hubbard Medal]] {{small|(2018)}} | signature = }} '''Peter Hamilton Raven''' (born June 13, 1936) is an American [[botanist]] and [[environmentalist]]. He is known for being the director, now President Emeritus, of the [[Missouri Botanical Garden]].<ref>{{Cite web|url=http://www.missouribotanicalgarden.org/about/additional-information/president-emeritus.aspx|title=President Emeritus|website=www.missouribotanicalgarden.org|access-date=2019-08-10}}</ref><ref>{{cite web|title=Royal Patrons and Honorary Fellows|url=http://www.linnean.org/fellows/Royal+Patrons+and+Honorary+Fellows|website=The Linnean Society of London|access-date=2014-07-25|archive-date=2014-07-14|archive-url=https://web.archive.org/web/2014