NPSpecies

Data Source: Bartgis, 1993;Leeson, n.d.;TNC, 1999; Wiegand, 1995;

Data Source: Helen Hamilton

Data Source: Helen Hamilton

Park Species Detail: Leeson, n.d.: Found in very dry areas. Bartgis, 1993: State listed as Threatened, an endemic to Allegheny County, Fairplay and PawPaw Bends South. Wiegand, 1995: Five previously reported occurrences for Kate's-mountain clover (Trifolium virginicum) were successfully updated during this survey. In Maryland this rare clover is officially listed as a threatened species and occurs only on shale habitats in Allegany and Washington Counties The extent of its known range closely approximates the limits of the shale-belt from extreme southern Pennsylvania through Maryland into western Virginia and West Virginia. Most of the reported Maryland occurrences are small with nearly two-thirds of the populations supporting less than thirty plants each. Until recently it was thought to be a shale barren endemic, but fieldwork in Virginia and West Virginia reported the species on limestone and diabase rock formations. Outside of this very restricted area it is known from nowhere else on earth. Until recently it was being considered by the US. Fish and Wildlife Service for federal listing, but recent field surveys have proven it to be more common within its limited range than was previously thought., Park Species Data Source: Bartgis, 1993;Leeson, n.d.;TNC, 1999;Wiegand, 1995