Nigel Cattlin / Crown imperial (Fritillaria imperialis) flower head, close up.

Murray Cooper / Bullet Ant (Paraponera clavata) pair drinking nectar from extrafloral nectaries, Ecuador

MYN / John Tiddy / Meat ant (Iridiomyrmex purpureus) grooming after feeding at non floral nectary, Wimmera, Victoria, Australia, January. meetyourneighbours.net project

Wild Wonders of Europe / Maitland / Nectary spurs of (Delphinium sp) Stenje region, Galicica National Park, Macedonia, June 2009

Will Watson / Pond water crowfoot (Ranunculus peltatus) with pear-shaped nectary, kettle hole pond, Herefordshire, England, UK.

Nigel Cattlin / Lenten rose (Helleborus hybridus) red flower of an ornamental garden plant showing typical structure of flowering Ranunculaceae, Berkshire, UK, February.

Morley Read / Ant (Ectatomma tuberculatum) drinking nectar from an extra-floral nectary on the leaf of an Inga tree. In the rainforest, Yasuni National Park, Ecuador.

Nigel Cattlin / A Ranunculaceae (Helleborus spp.) flower section showing stucture; anthers, stamens, styles, stigmae, nectaries