NPSpecies

Data Source: Bilton, 1991 Maxon, 1935;TNC, 1999; Wiegand, 1999; Wiegand, 2001;

Data Source: Helen Hamilton

Data Source: Helen Hamilton

Park Species Detail: Wiegand, 2001b: Harbinger-of-spring (Erigenia bulbosa) is listed as extirpated from D.C. It was last reported from Chain Bridge Flats by G. Vasey when he collected it in the vicinity of Little Falls in 1879. It has not been reported or collected from this area since that time, 122 years ago. Rich forested terrace habitat was thoroughly searched during 1999-2000 field surveys without success. However, suitable habitat remains intact in the area so there is a remote possibility that the species still occurs here.Status surveys for harbinger-of-spring are highly recommended to fully determine its current status at Chain Bridge Flats. Found at 0 sites. A Presumed Extirpated (SX) 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. 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., Park Species Data Source: Bilton, 1991-Ferry Hill;Maxon, 1935;TNC, 1999;Wiegand, 1999;Wiegand, 2001;Wiegand, 2001b;