What does "crookneck" mean?

Crookneck: Either of two varieties of squash, distinguished by their tapering, recurved necks. The summer crookneck is botanically a variety of the pumpkin (Cucurbita pepo) and matures early in the season. It is pale yellow in color, with warty excrescences. The winter crookneck belongs to a distinct species (C. moschata) and is smooth and often striped. [U. S.]