Cactus, Orchid cactus, Epiphyllum cultivar, Flower of the Night, Exootic white flowers against a black background.

Water lily, White water lily,Nymphaea alba, Single flower growing outdoor on water.

Water lily, White water lily,Nymphaea alba, Single flower growing outdoor on water.

Water lily, White water lily,Nymphaea alba, Single flower growing outdoor on water.

Sunflower 'Italian White', Helianthus annuus 'Italian White', Two yellow flowers growing outdoor.

Daisy, Double daisy, Bellis perennis, White flowers growing outdoor in a garden.

Allium, Garlic, Wild garlic, Allium ursinum, Side view of white flower growing outdoor.

Allium, Garlic, Wild garlic, Allium ursinum, Side view of white flower growing outdoor.

Allium, Garlic, Wild garlic, Allium ursinum, Side view of white flowers growing outdoor.

Allium, Garlic, Wild garlic, Allium ursinum, Side view of white flower growing outdoor.

Allium, Allium 'Mount Everest', Close up detail of white globe shaped flowerhead.

Iris, Siberian Flag, Iris sibirica, Studio shot of open pale blue flower head on an upright stem.