zucchini plant The zucchini or courgette is a summer squash which can reach nearly a meter in length, but which is usually harvested at half that size or less. Along with certain other squashes, it belongs to the species Cucurbita pepo. Zucchini can be dark or light green. A related hybrid, the golden zucchini, is a deep yellow or orange color. courgette cucurbita pepo var. melopepo cv. zucchini Cucurbita pepo