Gasner Hollow Prairie features a steep, dry lime prairie and oak savanna situated on a southwest facing bluff with exposures of dolomite and sandstone. The savanna is noted for its large component of chinquapin oak, here at the northern limit of its range. Most of the bluff is wooded, with gnarly bur and chinquapin oaks as the canopy dominants. Black and white oak are also present along with a dense shrub layer of hazelnut, gray dogwood, and black raspberry. The limestone rocks and cliffs provide habitat for species such as the smooth cliff brake, walking fern, and slender lip fern that are restricted to calcium rich substrates. The uppermost slopes and the top narrow ridge support a high quality dry prairie with a good assemblage of prairie species including large populations of the state-threatened pale purple coneflower (Echinacea pallida) and prairie Indian plantain (Arnoglossum plantagineum). Other rare species include the state-threatened yellow giant hyssop (Agastache nepetoides), and three special concern species--dragon sagewort (Artemisia dracunculus), broad beech fern (Phegopteris hexagonoptera), and amethyst shooting star (Dodecatheon amethystinum). Other plants are pasqueflower, butterfly weed, hoary puccoon, side oats grama grass, needle grass, and little blue-stem. A variety of reptiles including the prairie ring snake (Diadophis punctatus arnyi) and black rat snake (Elaphe obsoleta) are found here and large numbers of migrating birds, especially warblers and raptors, such as bald eagles, use the site. A series of Native American mounds are present on the bluff summit. Gasner Hollow Prairie is owned by private individuals and by the DNR. The site was designated a State Natural Area in 1998.