NPSpecies

Data Source: BioBlitz, 1997-Chain Bridge Flats;Cranberry Meadows, 1997;Bilton, 1991 Leeson, n.d.;Terrell, 1970;Wiegand, 2001; Wiegand, 2001b

Data Source: Helen Hamilton

see comments; Data Source: Helen Hamilton

Park Species Detail: Terrell, 1970: Shallow water of river in 3 (Lock 10 to Carderock, north parking lot); probably occasional along river. Fl. Begins late May. Cranberry Meadows, 1997: Common, Chain Bridge Flats above Chain Bridge; Common, Chain Bridge Flats below Chain Bridge; Chain Bridge Flats above tailrace. BioBlitz, 1997-Chain Bridge Flats: Mile Post 4 to AZ Ave on flats, woods, riverside, Warren Steiner, Jil Swearingen, Larry Morse; nice, uninvaded floodplain forest, historical record. Wiegand, 2001b: Water-willow (Justicia americana) was seen growing low to the river at several scattered sites within this survey area. It often dominates low, wet scour and deposition bars, and often occurs around the edges of low flood-pools. Water-willow is very common further upriver where it often dominates low, wet habitats. Found in 2 sites. 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.)Hamilton, 2007: See Dianthera americana, a synonym., Park Species Data Source: BioBlitz, 1997-Chain Bridge Flats;Cranberry Meadows, 1997;Bilton, 1991-Ferry Hill;Leeson, n.d.;Terrell, 1970;Wiegand, 2001;Wiegand, 2001b;