Fruit anatomy Fruit anatomy Fruit anatomy is the plant anatomy of the internal structure of fruit. Fruits are the mature ovary or ovaries of one or more flowers. In fleshy fruits, the outer layer (which is often edible) is the "pericarp", which is the tissue that develops from the ovary wall of the flower and surrounds the seeds. But 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. The
Boletellus ananas named by Moses Ashley Curtis as "Boletus ananas" in 1848, based on specimens he found near the Santee River, in South Carolina. In 1909, William Murrill described the new genus "Boletellus" and made "Boletellus ananas" the type species. According to Murrill, the taxon "Boletus isabellinus", described by Charles Horton Peck in 1897 from specimens collected in Ocean Springs, Mississippi, is a synonym of "B. ananas"; Peck described this species from undeveloped specimens. Wally Snell later doubted Murrill's conclusion in a 1933 publication; he considered the differences in the spore structure too great to consider the species conspecific with "B. ananas",