its fruit may be called marrow when mature.

Ordinary zucchini fruit are any shade of green, though the golden zucchini is a deep yellow or orange. At maturity, they can grow to nearly 1 m in length, but they are normally harvested at about 15-25 cm. In botany, the zucchini's fruit is a pepo, a berry (the swollen ovary of the zucchini flower)