the ornamental onion (allium regel) 'mount everest' flowering with wide umbels of pure-white flowers

mount everest allium regel arrangement attractive beautiful bloom blooming blossom botanic botanical botany clean close closeup clusters creamy detailed elegant fantastic flora floral flower flowering flowers foliage garden gardening globe green growing macro nature onion ornamental outdoors park parks petals plant popular pure rock seasonal starry summer umbels upright white wide 'mount everest' pure-white atop sturdy stems