Claim: Plateilema palmeri is from the sneezeweed tribe within the sunflower family, and there is only one known species.
Evidence: Plateilema is a genus of flowering plants in the sneezeweed tribe within the sunflower family. There is only one known species, Plateilema palmeri, native to Texas (Big Bend National Park in Brewster County), Coahuila, and Nuevo León.