abstract background feathery grass wallpaper fine garden natural nature ornamental plant stems texture astilbe clusters color colored colorful colors colour coloured colourful colours cultivars dense false-goats-beard false-spiraea feathery-plumes flower-clusters flowers foliage herbaceous-flowering-plants hybrids long-blooming meadowsweet perennials pink plume plume-like-flowers plumes profuse profuse-blooms stalks bird black feather isolated quill silhouette symbol white blue cirrus cloud sky wispy formations fuzzy green seed dishcloth flabby limp pattern soft tender towel wiper