NPSpecies

Data Source: Boone, 1986;TNC, 1999; Wiegand, 1999; Wiegand, 2001; Wiegand, 2001b;

Data Source: Helen Hamilton

Data Source: Helen Hamilton

Park Species Detail: Wiegand, 2001: Two new and 15 previously known occurrences for Tall tickseed (Coreopsis triptens) were documented. The total number of plants is estimated at 500 to 600 scattered throughout the Potomac Gorge in groups ranging in size from 3 to 300 plants. The species is not currently known in Maryland outside of the Potomac Gorge. No plants could be located at six sites (from Sandy Hook, Maryland to District of Columbia line) where tall tickseed was previously known to occur. Bartgis, 1993: State Endangered plant, found in Potomac Fall-Line. Wiegand, 2001b: A previously reported occurrence for Tall tickseed (Coreopsis tripteris), listed as a highly rare plant species in D.C., was successfully updated during 1999-2000 field surveys. Twenty-two flowering plants were counted during a late August visit to the site. Suitable habitat for tall tickseed is abundant in the vicinity, so this occurrence could be more extensive than reported here.Status surveys for this species are highly recommended to fully determine its current status at Chain Bridge Flats Survey Site. Found at 1 site. A Highly Rare plant species known to occur within the District of Columbia portion of LOCO (along the C&O Canal NHP and Potomac River from the Maryland line to Key Bridge, Washington, D.C.) Also a listed species in Maryland. 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: Boone, 1986;TNC, 1999;Wiegand, 1999;Wiegand, 2001;Wiegand, 2001b; Bartgis, 1993;