cirsium arvense (l.) scop..

achaenium achene achenium achenocarp akene anemochoria anthodium arvense aster asteraceae barren bloom blossom calathidium california calyx canada canadian cirsium compositae composite corn creeping cursed daisy dioecious dioecy environment family farmland field flower flowered from fruit geofity green hard hell herba herbaceous households inflorescence leaf lettuce meadow nature pappus perennial perennis pink plant prickly scop small stamen stem summer sunflower thistle two vegetation way weed x28 x29