Ira Loren Wiggins (1 January 1899 – 28 November 1987) was an American botanist, Curator of the Dudley Herbarium, and Director of the Natural History Museum (1940-1962) at Stanford University.
He was a Stanford faculty member from 1929 until his retirement in 1964.
He was the first recipient of the Fellow's Medal of the California Academy of Sciences.
His Flora of Baja California is a standard work on the botany of the Baja region.
Wiggins attended Occidental College as an undergraduate and received his M.A.
at Stanford, studying with LeRoy Abrams; he earned his PhD in 1930 with a thesis on the flora of San Diego County.
Wiggins took several field trips to the Sonoran Desert, collaborating with Forrest Shreve in a description of the desert flora of Baja California.
He published extensively on the flora of the desert, the ecology of the Arctic Slope of Alaska, and flora and fauna of the Galapagos Islands.
Starting in May of 1944, Wiggins spent nine months in Ecuador as part of the Mision de Cinchona.