NPSpecies

Data Source: Bartgis, 1993;Boone, 1986;TNC, 1999; Terrell, 1970;Wiegand, 1999; Wiegand, 2001;

Data Source: Helen Hamilton

see comments; Data Source: Helen Hamilton

Park Species Detail: Wiegand, 2001: Former candidate for federal listing that was reported during 1999-2000 surveys from Sandy Hook, Maryland to District of Columbia line. One new and five previously reported occurrences for Rock skullcap (Scutellaria saxatilis) were documented. All of these occur in the Potomac Gorge between Bear Island and Carderock Uplands. Several thousand plants grow on Bear Island, but the other occurrences are much smaller and total approximately 300 individuals. Rock skullcap is generally considered to have a restricted range covering much of the central Appalachian region. The occurrences in the Potomac Gorge are at the very outer fringe of this area and may represent the northeastern extremity of the species' natural distribution. Rock skullcap was formerly a candidate species for federal listing and should be considered important on a regional basis as well as endangered in Maryland. Outside of the survey area this species is currently reported from only a single other occurrence in Maryland. Terrell, 1970: Rare; rocky woods in area (Bear Island), where fl. Late May. Bartgis, 1993: Found in Potomac Fall-Line; one of several plants considered to be rare throughout their range and are under review for potential federal listing. State Endangered plant. Wiegand, 1999: Plant species documented in the survey area (from Great Falls, Maryland, downriver to the District of Columbia) during this survey. Currently listed in Maryland as endangered or endangered/extirpated., Park Species Data Source: Bartgis, 1993;Boone, 1986;TNC, 1999;Terrell, 1970;Wiegand, 1999;Wiegand, 2001