Edible part in 'sorosis', a composite fruit, is

Composite fruits develop from entire inflorescence, eg, syconus develops from hypanthodium, eg, banyan. Sorosis is the composite fruit develops from spike and catkin, eg, in pineapple. Sorosis fruit develops from catkin; and edible part of pineapple fruits is peduncle and perianth. Fleshy thalamus is an edible part of pear, apple fruit, ie, pome fruits. Cotyledons are edible part of cashewnut, ie, nut fruit. Endosperm is an edible part of caryopsis of wheat, rice, etc.