NPSpecies

Data Source: Gleason & Cronquist, 1991 Legacy NPSpecies information may no longer be applicable, please remove if it is not applicable. In legacy NPSpecies Weedy value was Yes with comment: see comments

Data Source: Gounaris, 2000

Park Species Detail: Hobson, 1998: Not found to be common in the surveyed areas, but are likely to be more widespread than survey results indicate. . . . rated as "highly invasive" on the Invasive Alien Plant Species of Virginia list (DCR-DNH, 1996)./Gounaris, 2000: Characterized by mediium invasiveness, while covering a relatively high percentage of the park. Yorktown: More than ten populations of varying size and plant density were found on the eastern end of the park. It is common in the village. It was also found within -9 acres of roadside. Green Spring: One small population found adjacent to field Colonial Parkway: Found, often densely distributed, within ~ 103 acres of the parkway corridor. Neck of Land: One small and I large population found in two old homesite areas./ Hamilton, 2005: Rated "moderately invasive" in Invasive Alien Plant Species of Virginia, DCR/DNH, September, 2003./, Park Species Data Source: Hobson, 1998-Yorktown Unit/ Cheatham and Wormley Pond Drainages;Loetterle, 1970-Jamestown Unit /Jamestown Island;Salle,1972-Colonial Parkway;Gounaris, 2000 -Colonial Parkway/Jamestown Unit/Yorktown Unit;Weber, 2002-Jamestown Unit /Jamestown Island;VanAlstine, 2004-Entire Park