Caryopsis is a fruit of family-Gramineae eg, Wheat. Caryopsis fruit is characterised by fused fruit and seed wall. Cypsella is a fruit of family-Compositae eg, Sunflower. Achene are simple, dry, single seeded arc in dehiscent fruit and dry pericarp is free fro- single seed except at one point eg, Mirabilis. Endosperm is a triploid nutritive structure of angiospermic seeds.