Flowers, often open and flat, pretty/with lines/spotted, producing scent (especially in winter Sarcococca or bad smelling Arum) producing nectar to attract insects to the flower. Pollen is larger/sticky/rough which tends to stick to the insect. The stigma is often sticky, large and flat. The time of flowers opening may coincide with its pollinator – night for moths. Bees collect nectar and pollen from the flowers for food and in collecting these transfer pollen from anther to stigma and flower to flower.