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 including "Pinus" and "Quercus" species in southeastern North America and Central America, "Quercus humboldtii" in Colombia, various Fagaceae and Dipterocarpaceae species in Malaysia, and "Leptospermum" and "Pinus" species in New Zealand. In Guyana, the humic deposits on "Dicymbe" trunks bearing "B. ananas" are consistently permeated with abundant ectomycorrhizas. The fungus was reported as forming mycorrhizal associations with eucalypts in Australia, based on fruit body association with trees. Its North American distribution encompasses a range extending north from North Carolina to Florida, west to Texas and south to Mexico, and Central America. In 2008, it was reported for the first time