allium ball-shaped black black-seeds brittle brown colors colours dried-up dry flowering onion-seed-head-ball onion-seeds onions seed-head seeds straw-colored straw-coloured vegetable vegetable-garden countryside Dandelion flower green head nature plant seed white foliage grow growing seedhead England goatsbeard Hampshire parachute Tragopogon wild autumn corn fall field garden poppy summer blue copyspace isolated sky stem weed delicate leaves propagate weeds ball blow disperse puff scatter stalk