Donald Ray Simpson
# Donald Ray Simpson

Donald Ray Simpson (* 1932) es un botánico estadounidense.

# Donald Ray Simpson
## Obras

* Simpson, D.R. 1973. New species from South America, I- (Fieldiana: botany)
* Simpson, Donald R. 1976. A partial revision of Paullinia (Sapindaceae) for Ecuador, Perú, and Bolivia Chicago: Field Museum of Natural History. (libro, Vol. 36) Universidad de Illinois Urbana Champaign.
* Simpson, Donald R., & David Janos. Families of Dicotyledons of the Western Hemisphere South of the United States. Based on the Punch Card Key to the Families of Dicotyledons of the Western Hemisphere South of the United States