These spiders can change their colour to some extent to match the flower they are in and are white, yellow or pink, and various hues in between. As they are usually so well camouflaged they generally go unnoticed, until they are off their preferred colour of flower.
As a free roaming spider it is not confined to a web, but lurks in flowers and ambushes unsuspecting visitors including bees, flies and butterflies.
The flower crab spider is fairly common in southern Britain, and has been seen in gardens more often over the last 10 years.