NPSpecies

Data Source: Maxon, 1935; Wiegand, 1999; Wiegand, 2001; Wiegand, 1995

Data Source: Helen Hamilton

Data Source: Helen Hamilton

Park Species Detail: Maxon, 1935: Rare. Wiegand, 2001b: Found at 0 site. A 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 a listed species in Maryland. Hamilton, 2007: In Wiegand, 2001b, Table #3, page 71, Current Status in DC = Rare; not listed in Rare Plant Species on page 6. Wiegand, 2001: Documented from Maryland during this survey from Sandy Hook, Maryland, to District of Columbia line.Watch List plant species, not officially listed by the State of Maryland nor by the Maryland Wildlife and Heritage Division. Wiegand, 1999: A Watch List species in Maryland, documented to occur in the gorge during this survey from Great Falls, Maryland, downriver to the District of Columbia line. Wiegand, 1995: Reported during this survey from Sandy Hook west to Cumberland., Park Species Data Source: Wiegand, 1999;Wiegand, 2001;Wiegand, 1995; Maxon, 1935;