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Cucurbita sororia is a plant species of the genus Cucurbita, sometimes considered to be a subspecies of Cucurbita argyrosperma, C. a. subsp. sororia. It ranges from northern Mexico to Nicaragua, mostly along the Pacific coast. This species was originally considered closely related to Cucurbita texana but C. sororia was later shown to be an ancestor of Cucurbita argyrosperma, with which it hybridizes well.