Erigeron lemmonii is a rare species of flowering plant in the daisy family known by the common name Lemmon’s fleabane. It has been found only in Scheelite Canyon on the grounds of Fort Huachuca Military Reservation in Cochise County, Arizona. The species is named for John Gill Lemmon (1831 - 1908), husband of prominent American botanist Sarah Plummer Lemmon (1836 – 1923).