Final answer:
An aposepalous calyx indicates that the sepals of the flower are not joined together. The term relates to the calyx, which is the collective name for the sepals that protect the developing flower.
Step-by-step explanation:
By definition, a flower with an aposepalous calyx has sepals not joined together. The calyx is the collective term for all of the sepals of a flower, which serve to protect the flower as it develops. The term 'aposepalous' specifically refers to sepals that are free from one another, in contrast to 'gamosepalous' where the sepals are fused or joined together. A complete flower typically consists of four whorls: the calyx (whorl of sepals), corolla (whorl of petals), androecium (male reproductive parts), and gynoecium (female reproductive parts). The calyx and corolla together form the perianth, which assists in the protection and attraction for pollination of the flower.