varies from 1 to 4 inches in diameter and from 2 ounces to about 1 pound in weight
they have a pronounced and typical fragrance , similar to lemon rind but less sharp.
the outer skin may be rough, thick and green before maturity,but becomes yellow,maroon or green when ripe. the pulp inside may be sweet or sour.
the seeds in the central pulp vary in number and hardness,depending on species.