centaurea calcitrapa

star thistle starthistle wildflower herbaceous yellow black stripes centaurea calcitrapa typical wild grass long white pappus poster needle spineedged appendages conical shaped herb spiny edged leaves parachute closeup milkwhite veins bracts sorrounded flower head grooved stem quill traditional medicine light cottony fuzz wallpaper thorn silybum marianum calendar purple flowers medicinal plant typically pinnately lobed postcard mediterranean milk spike mary upright blessed milkthistle marian toxicity