The term 'flower organ' refers to the three main parts of a flower: the STAMEN, pistil, and nectary. The STAMEN is the male reproductive organ of a flower, consisting of a filament and an anther that produces pollen. The pistil is the female reproductive organ of a flower, consisting of an ovary, a stigma, and a style. The nectary is a glandular organ in a flower that secretes nectar, a sugary liquid that attracts pollinators.