Winter squash is an annual vegetable representing several squash species within the genus "Cucurbita". It differs from summer squash in that it is harvested and eaten in the mature stage when the seeds within have matured fully and the skin has hardened into a tough rind. At this stage, most varieties of this vegetable can be stored for use during the winter. Winter squash is generally cooked before being eaten, and the skin or rind is not usually eaten as it is with summer squash.