Ivan Murray Johnston

His plant collections are housed in the Rancho Santa Ana Botanic Garden, in Claremont, and also in the Gray Herbarium of Harvard University.

In 1925, German botanist August Brand, named a genus of flowering plants (belonging to the family Boraginaceae) from South America and the southern United States, as Johnstonella in Johnston's honour.

[2] Then in 1933, botanist O.E.Schulz named a genus of flowering plants (belonging to the family Brassicaceae), from Chile as Ivania.

[3] In 1936, botanist Hsen Hsu Hu published Sinojohnstonia, which is a genus of flowering plants from China, belonging to the family Boraginaceae.

[4] In 1975, another botanist Syed Muhammad Anwar Kazmi, named a monotypic genus of flowering plants (belonging to the family Boraginaceae), from the Western Himalaya region, Ivanjohnstonia also named in his honour.