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Charles Dwight Marsh (December 20, 1855 – April 23, 1932) was an American botanist.[1]
Marsh graduated with A.B. from Amherst College in 1877 and with Ph.D. in Zoology and Botany from the University of Chicago in 1904.[2] Employed by the Bureau of Plant Industry, U.S. Department of Agriculture, he was in charge of field experiments on locoweed.[3] In 1912 from January 15 to February 16 he did field research for the Biological Survey of the Panama Canal Zone, where he collected samples of the plankton in fresh waters.[4][5]