NPSpecies

Data Source: Bartgis, 1993;Bilton, 1991 Leeson, n.d.;Maxon, 1935;Wiegand, 1999; Wiegand, 2001; Wiegand, 1995;

Data Source: Helen Hamilton

Data Source: Helen Hamilton

Park Species Detail: Maxon, 1935: Species included on the strength of satisfactory records, but no specimen is preserved. Extinct. Terrell, 1970: Looked for but never found. Bilton, 1991: buds. 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: Bartgis, 1993;Bilton, 1991-Ferry Hill;Leeson, n.d.;Maxon, 1935;Wiegand, 1999;Wiegand, 2001;Wiegand, 1995;