Rhododendron, Studio shot of white flowers on a stem against a pure white background.

Rhododendron, Studio shot of white flowers on a stem against a pure white background.

Hawthorn, Common hawthorn, Crataegus monogyna, Studio shot of branch with white flowers.

Aquilegia, Columbine, Single stem of plant with pale purple head set against a pure white background.

Aquilegia, Columbine, Single stem of plant with slightly dropped pale purple head set against a pure white background.

Aquilegia, Columbine, Single stem of plant with slightly dropped pale purple head set against a pure white background.

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

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

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

Kaffir lily, Hesperantha coccinea, Studio shot of open and emerging red flowers on a vertical stem.

Kaffir lily, Hesperantha coccinea, Studio shot of open and emerging pink flowers on a vertical stem.

Kaffir lily, Hesperantha coccinea, Studio shot of open and emerging pink flowers on a vertical stem.