NPSpecies

Data Source: BioBlitz, 1997-Chain Bridge Flats;Maxon, 1935;Terrell, 1970;Wiegand, 2001b;

Data Source: Helen Hamilton

see comments; Data Source: Helen Hamilton

Park Species Detail: Terrell, 1970: Frequent in woods; areas 1 (Beginning of Canal in Georgetown to Chain Bridge, D. C.), 2 2 (Chain Bridge to Lock 10 parking area opposite Plummer's Island) 6 (Great Falls; islands overlooking Falls), ; expected elsewhere. Fl. Begins in May. BioBlitz, 1997-Chain Bridge Flats: Below Fletchers, Warren Steiner, Jil Swearingen, historical record. Wet savannah, L.K.Thomas, Jr. Wiegand, 2001b: An uncommon plant species occurring in slightly more elevated areas of overwash savanna and woodland habitat, where flooding is less frequent and less intense. Wild onion (Allium canadense) is scattered in several habitats throughout this survey site. Found in Fletchers Floodplain Survey Site.Found at 3 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 Allium canadense var. canadense TSN# 182590 with voucher., Park Species Data Source: BioBlitz, 1997-Chain Bridge Flats;Maxon, 1935;Terrell, 1970;Wiegand, 2001b;