bees gather nectar on two-toned burgundy-green flower heads of allium sphaerocephalon, also known as drumstick allium, which

bees allium sphaerocephalon drumstick purplegreen flower heads greentopurple flowers burgundy alliums ornamental onions globemaster summer garden landscape pollination nature design plants gardening horticultural perennial bulbous purple green collecting nectar beekeeping honey production