One of the worst weeds in New Jersey is this gorgeous red-fruited rose, multiflora rose (Rosa multiflora). It spreads its thorny, fast-growing, end-rooting branches like wild fire in the open meadows, and is hard to kill off. But the fruits, true but small rosehips, are gorgeous in the December sun. This species is a horrible invasive in the US and originally from Asia.
Species: multiflora rose, Rosa multiflora, Rosaceae
[image by Vilseskogen on Flickr, Creative Commons]
