Wimmeranthus is a genus of flowering plants belonging to the family Campanulaceae. It contains a single species, Wimmeranthus inopinatus, an annual endemic to Oaxaca in southwestern Mexico.[1]
It is known from a specimen collected near San Juan Mixtepec in the Sierra Madre del Sur of Oaxaca, growing in a forest of Juniperus flaccida, Annona cherimola, and Bursera bipinnata on shallow and rocky soil at 1,800 meters elevation.[2]