NPSpecies

Data Source: Killip, 1931;Maxon, 1935;TNC, 1999; Wiegand, 2001b;

Data Source: Helen Hamilton

locally common along watered section of canal and in pools along Widewater, Bear Island; Data Source: Helen Hamilton

Park Species Detail: Killip, 1931: A single plant on the east sandbar. Reported earlier but not represented in the herbarium. Maxon, 1935: Known only from the mainland; Also observed on Island. Wiegand, 2001b: A previously reported occurrence for Blue flag (Iris versicolor), listed as a highlv rare plant species in D.C. was successfully updated during 1999-206 field surveys. Several large groups containing more than 100 leaves and two fruiting stems were growing in a 2x3 meter area. Suitable habitat for blue flag 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.), Park Species Data Source: Killip,1931;Maxon, 1935;TNC, 1999;Wiegand, 2001b;