Nectaries
Tissue which secretes nectar to attract pollinating insects. Plants which rely on insects, birds or bats for pollination will often have nectaries.
In a hellebore flower, the nectaries are the true petals and can be seen around the stamen and pistils. They can vary in colour and size, with flowers having larger nectaries being classed as anemone form. These nectaries will fall away after pollination.