American larch Antarctic flora brush brush-wood brushwood bush cushion decay flower forest grass green grow grown moss moss cushion natural nature Non-vascular land plant plant shortstraw pine soft summer Terrestrial plant tiny underbrush vascular plant wood woods Asteraceae color colored colors colour coloured colours conospermum cushion bush decorative display dried flower arrangements flora flower arrangement flowers gray grey growth leucophyta brownii native shrub silvery smoke bush smokebush snow bush tangle wildflowers