Ключевые слова: america, asteraceae, beautiful, biennial, biology, bloom, botanical, botany, carduus, carduus nutans, ecological, ecology, environment, environmental, flora, flower, forest, habitat, invasive, invasive species, kettle, leaf, meadow, midwest, moraine, musk, musk thistle, natural, nature, nodding, nodding thistle, nutans, outdoors, park, pink, plant, prairie, pretty, scene, seed, species, spiny, state, stem, sunflower, thistle, vegetation, wild, wisconsin,