NPSpecies

Data Source: Killip, 1953; Wiegand, 2001; Wiegand, 2001b;

Data Source: Helen Hamilton

Data Source: Helen Hamilton

Park Species Detail: Wiegand, 2001b: An uncommon plant species occur in slightly more elevated areas of overwash savanna and woodland habitat, where flooding is less frequent and less intense. Woodland sunflower (Helianthus divancatus) was seen at a single location Only 16 flowering plants were seen. This species is fairly common and widespread immediately upriver and likely occurs on Chain Bridge Flats more frequently than indicated here. Found at 1 site. A watch list (and otherwise uncommon) 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, 1953;Wiegand, 2001;Wiegand, 2001b;