The FDA's guidelines on what can be termed 'pumpkin' are somewhat ambiguous. A variety of squashes, not just pumpkin, can be canned and sold under this label. This is largely because pumpkin can sometimes be watery and stringy, making it challenging to prepare. Therefore, manufacturers often opt for a blend of winter squashes, such as butternut squash, Dickenson squash, and other orange-fleshed squashes.