Complex sentence: In some seemingly pericarp fruits the edible portion is not derived from the ovary, for example in ackee the edible portion is an aril, and in pineapple several tissues from the flower and the stem are involved.
Split into simpler sentences: In some seemingly pericarp fruits, the edible portion is not derived from the ovary. For example, in the fruit of the ackee tree, the edible portion is an aril; and in the pineapple several tissues from the flower and stem are involved.