|A Coco de Mer (Lodoicea maldivica) at a botanical garden in Sri Lanka|
|A single seed of this palm|
Histornally, the seeds of the Coco de Mer have been used to make such things as bowls. Unfortunately, the seeds are often collected by those who are fascinated by them in such high numbers that few to no new plants have been sprouting. Fires have also been an issue. The Coco de Mer is a Vulnerable species. Efforts are being made to protect this unusual palm.
Source is ARKive. Images are from Wikimedia Commons and are copyright free: one, two