The bryophytes of Hocking County, Ohio, have been collected for more than a century. Ninety, or 73% of Ohio's liverwort species, and 236, or 60% of Ohio moss species have been found growing on its dry oak ridges, sandstone rock exposures, and moist hemlock ravines. Crane Hollow Preserve, a private natural area comprising 704 ha, supports 49, or 40% of Ohio's liverwort species, and 167, or 43% of Ohio moss species.