Frullania stylifera, previously known only from its southern Minnesota type locality, is newly documented from stations in Arkansas, Missouri, Oklahoma, and Tennessee. The species has often been confused with F. inflata and F. eboracensis, but differs from those species in having broadly reniformovate dorsal lobes; larger, lamelliform styli; more numerous oil bodies; larger underleaves with angulations on the margins; and half-immersed, more gradually rounded, weakly keeled perianths.