Cucurbita foetidissima Kunth
Family: Cucurbitaceae
buffalo gourd, Missouri gourd, wild pumpkin
[Pepo foetidissima (Kunth) Britton]
Cucurbita foetidissima image
from USDA Plants website  
Cucurbita foetidissima image
Michael L. Charters  
Cucurbita foetidissima image
Michael L. Charters