Yellow crookneck squash is a variety of summer squash (species Cucurbita pepo) with bumpy, yellow skin and sweet flesh. The taste is closer to winter squashes than to summer squashes, although it is a short-season bearer. The squash are supposed to taste best when harvested at approximately 6 inches in length. This Cucurbitales article is a stub. Please help Wikipedia grow by expanding it. You can grow them and eat them. They are bumpy.