Edible part in 'sorosis', a composite fruit, is
cotyledons
endosperm
perianth and peduncle
fleshy thalamus
Pappus is modified
calyx
corolla
bracts
gynoecium
A.
calyx
The pappus is the modifed calyx, the part of an individual floret that surrounds the base of the corolla tube in flower heads of the plant Asteraceae. It basically functions as a parachute for the dispersal of- eg, Sonchus, Tagstes. Hence the mechanism is parachute mechanism.
Trimerous flower, superior ovary and axile placentation is characteristics of
Liliaceae
Cucurbitaceae
Solanaceae
Compositae