NPSpecies

Data Source: White and Pyne 2003

Native Range: China (Tu 2002); Data Source: http://plants.usda.gov, 10 August 2007 Legacy NPSpecies information may no longer be applicable, please remove if it is not applicable. In legacy NPSpecies Weedy value was Yes with comment: Thickets, disturbed areas, bottomland forests; uncommon. (Weakley 2007) In legacy NPSpecies Pest value was Yes with comment: Natureserve I-Rank: High/Low. I-Rank Reasons Summary: Dioscorea oppositifolia alters community structure and composition by overtopping existing vegetation layers and shading species in lower layers (Tu 2002). It is reported as invasive in four states (Miller et al. 2002). A unique propagule, known as a "bulbil," is dispersed by water currents (Tu 2002). D. oppositifolia establishes in distrubed areas and spreads from there into undisturbed sites (Tu 2002). This species resprouts after cutting and vigorously reproduces asexually, but it can be controlled with herbicide treatments (Tu 2002).

Park Species Detail: Possible county record, Park Species Data Source: Langdon and Rock 2000; Rogers 2000; White and Pyne 2003