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 spirally arranged, faint golden encrusting pigments that can be seen in KOH, Melzer's reagent, and water. Clamp connections are absent in this species. The typical variety of "Boletellus ananas" has consistently larger fruit bodies than "B. ananas" var. "minor" Singer from Brazil and Nicaragua, and lacks the thick-walled cheilocystidia of "B. ananas" var. "crassotunicatus" Singer from Nicaragua and Panama. Although the mushroom is used as a food in Mexico, field guides list it as "inedible" or "not recommended". "Strobilomyces strobilaceus" is roughly similar in appearance because of its rough scaly cap and lacerated margin, but may be distinguished from "B.