NPSpecies

Data Source: Leeson, n.d.;Maxon, 1935;Wiegand, 2001; Wiegand, 2001b;

Data Source: Helen Hamilton

Data Source: Helen Hamilton

Park Species Detail: Wiegand, 2001b: Ditch stonecrop (Penthorum sedoides) was seen at several widely scattered places at Chain Bridge Flats during the current survey. A few plants usually grow in saturated soil near the river shoreline or in low depressions or around the edges of potholes. It seems to prefer conditions of wet, silty soil and full sunlight. Found at 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.), Park Species Data Source: Leeson, n.d.;Maxon, 1935;Wiegand, 2001;Wiegand, 2001b;