The COCO DE MER palm tree has the earth’s largest fruit, weighing 42 kg and seeds weighing 17 kg. Pumpkins and avocados are not vegetables. They are fruits. REASON : A pumpkin, from a botanist's perspective, is a fruit because it's a product of the seed-bearing structure of flowering plants . Avacados are fruits from a botanical perspective but usually categorized as vegetables in cooking or food science. Some mutated apples are half red and half green. Grapes and raisins can result in kidney failure in dogs, and may be fatal to other pets as well. Japanese Yubari cantaloupes are the most expensive fruit in the world; two melons once sold at auction for $23,500.