Robert Harding Whittaker (December 27, 1920 – October 20, 1980) was an American Plant ecologist who was active in the 1950s to the 1970s.

Early LifeEdit

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Whittaker recieved a Bachelor of Art from Washburn Municipal College (Washburn University). After military service he then obtained a Ph.D. from the University of Illinois.


In 1969 Whittaker proposed the Five-Kingdom taxonomic classification of the world's organisms into Animalia, Plantae, Fungi, Protista, and Monera.

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