NPSpecies

Data Source: Bartgis, 1993;Boone, 1986;Lea, 2000; Maxon, 1935;TNC, 1999; Wiegand, 2001; Wiegand, 2001b; ;

Data Source: Helen Hamilton

see comments; Data Source: Lea, 2000;

Park Species Detail: Wiegand, 2001: Plant species documented in the survey area (from Sandy Hook, Maryland to District of Columbia line) during this survey. Lea, 2000: Carex leavenworthii Dewey (Leavenworth's Sedge)Infrequent. In low, disturbed areas, including open, channel-shelf woodlands, dry riverside prairies, and in openings in floodplain forests. Found at Bear, High, and Roosevelt Islands, Great Falls Park, Virginia, and Fletcher's floodplain. This species has been listed as historical for Maryland (Maryland Natural Heritage Program, 1994). It has also been found elsewhere in Maryland since 1994. It is probably somewhat overlooked or misidentified. Mid-May to late June. 1084,1140,1153,2097 (US); 1579 (MARY); 1060,1085, 1249 (Tawes); 1563 (Grfa); 1144 (Frost). Bartgis, 1993: State Endangered extirpated plant, in Potomac Fall-Line. Wiegand, 2001b: Found in Fletchers Floodplain 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 listed in Maryland. Wiegand, 1999: Currently considered to be extirpated from Maryland, previously reported from Potomac Gorge, but not successfully updated during the course of this survey (from Great Falls, Maryland, downriver to the District of Columbia)., Park Species Data Source: Bartgis, 1993;Boone, 1986;Lea, 2000;Maxon, 1935;TNC, 1999;Wiegand, 2001;Wiegand, 2001b;