Stock photography, photos: Musk Thistle Stock photos of Developing Musk Thistle Blossom, Manitowoc County, WI Photograph: © Jerome Wilson Click for a larger image and more information Keywords associated with this stock photo: Carduus nutans, flower, wildflower, bloom, weed, invasive, Wisconsin, WI, green, red, spiny, prickly, Musk Thistle