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: Hobson, 1998

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). . . . may be decisively controlled using manual removal techniques and/or direct application of select herbicides./Hamilton, 2005: Not on "Invasive Alien Plant Species of Virginia" DCR/DNH September 2003; not found by Gounaris, 2000, "Inventory of Invasive Exotic Plants of Colonial National Historical Park", Synonym Crepis japonica (L.) Benth TSN # 196317./, Park Species Data Source: Hobson, 1998-Yorktown Unit/ Cheatham and Wormley Pond Drainages;