Johannes Jacobus Smith was a Dutch botanist who, between years 1905 to 1924, crossed the islands of the Dutch East Indies, collecting specimens of plants and describing and cataloguing the flora of these islands. The standard botanical author abbreviation J.J.Sm. is applied to plants described by J.J. Smith.
The description of the flowers of the western half of New Guinea is largely based on his work. He was, next to Rudolf Schlechter, the most prolific author on New Guinea orchids. He also described numerous plants from other families, such as Ericaceae and Euphorbiaceae.