fromwww.scientificamerican.com
2 days agoBefore Flowers Existed, Ancient Cycad Plants Lured Insects with Heat
The words pollination and flower may seem inseparable, but plants began courting insects millions of years before they evolved flashy petals. Now we know how they may have done it: not with dazzling color but with radiant heat. A study published today in Science reveals that cycads, tropical plants that resemble palms, attract beetles using infrared radiation generated by their conelike reproductive structures.