Caltha (Marsh marigold) plants - habit

Caltha flower

Caltha flower cutaway

Caltha fruit close-up; note follicle split open to expose seeds

Aquilegia (Columbine) flower; note petals modified to make nectar spurs

Aquilegia (Columbine) fruit - follicles

Aconitum flower; note bilateral symmetry

Aconitum flower - bee's eye view; note unfused parts and many stamens

Actea in fruit - berry

Thalictrum "Meadow rue" - wind-pollinated; male plant (dioecious)