Ivan Murray Johnston

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I. M. (Ivan Murray) Johnston (February 28, 1898–May 31, 1960),^[1] was a United States botanist. He studied at Pomona College in Claremont, California and at Harvard University. His plant collections are housed in the Rancho Santa Ana Botanic Garden, in Claremont, and also in the Gray Herbarium of Harvard University.

His areas of interest, were, among others: Pteridophytes, Spermatophytes