The Edge of Appalachia Preserve System has 94 rare species (Ohio Division of Natural Areas & Preserves 2000), which is one of the largest concentrations of rare species in the state (Kitty Todd Preserve in Lucas County has a few more rare plant species). Six of these species were not found during this study but have been reported from the preserve system.
The first confirmed record of Cuscuta indecora was discovered by McCarty and Minney for Ohio. Previous reports of this species were based on misidentified Cuscuta suaveolens (Cooperrider 1995). Other significant finds include the rediscovery of Prunus mexicana, the only second extant site for Lathyrus venosus, the fourth extant site for Aster ontarionis, and numerous sites of the endangered Carex purpurifera, Panicum verrucosum, Physalis virginiana, and Scleria oligantha. New locations for several threatened species were found during this study. The most significant was the discovery of Melanthium virginicum, which is currently known from mostly fens in northeastern Ohio. Numerous locations of other rare species were found during this study.
Other rare species searched for during this study but were unable to be locatedinclude Botrychium biternatum, Juncus secundus, Phaseolus polystachios, Poa wolfii, and Ranunculus fasicularis. Several trips were made to the location where Lilium superbum had been reported but was not found during this survey. The site is close to Blacks Run Road and the plants may have been removed for a home garden. The state extirpated Asplenium resiliens may be found in the preserve system. The only known Ohio collection was from Green Township. In 2002, Barbara Lund re-discovered Heuchara longiflora on the preserve system that was also previously known from only one collection. It is very possible that Asplenium resiliens will be discovered in the preserve system.