close up of yellow starthistle spiny bushes growing on a wild steppe field. centaurea solstitialis invasive plant with flowers and

agriculture asteraceae background barnabys beautiful beauty bloom blooming blossom bud bush centaurea closeup cockspur damage field flora flower golden grass green grow horticulture invasive land macro meadow native natural nature needle pasture pest plant shrub sky solstitialis spiky spiny star starthistle steppe summer thistle thorn uncultivated weed wild wildflower yellow