Acorn squash (Cucurbita pepo) is a winter squash with istinctive longitudinal ridges and sweet, yellow-orange flesh. Although considered a "winter" squash, acorn squash belongs to the same species as all "summer" squashes (including zucchini and yellow crookneck squash). The most common variety is dark green in color. However, newer varieties have arisen including Golden Acorn, for its glowing yellow color, and some that are white. They can also be variegated (multi-colored). As the name suggests, its shape resembles that of an acorn. It is also good for winter storage, keeping several weeks in a dry location such as a cellar.