Ernest Brown Babcock (July 10, 1877 – December 8, 1954) was an American plant geneticist who pioneered the understanding of plant evolution in terms of genetics.[1] He is particularly known for seeking to understand by field investigations and extensive experiments, the entire polyploid apomictic genus Crepis, in which he recognize 196 species.[2] He published more than 100 articles and books explaining plant genetics, including the seminal textbook (with Roy Elwood Clausen) Genetics in Relation to Agriculture.[3] The standard author abbreviation Babc. is used to indicate this person as the author when citing a botanical name.[4]