From the archive record
For plants too, sex can be a hot and smelly affair. In most plant-insect partnerships, the pollinator seems to do most of the work by voluntarily transferring pollen from plant to plant in exchange for a meal. But an ancient lineage of plants – the cycads – takes more active steps to ensure its future with a bizarre combination of heat and smells. In the afternoon, they use heat and a toxic stench to drive insects out of male cones only to lure them into female cones in the evening with a more alluring scent. Cycads were around before the time of the dinosaurs and their six-legged puppets are a group of similarly ancient insects called thrips. The thrips make their homes among the single large cone that sits atop the cycad trunk, looking like an enormous pine cone. The thrips prefer the ma