Thelma Sanders Winter Squash Seeds. 85 - 95 days to maturity. Cucurbita pepo. Heirloom, Annual. A family heirloom from Thelma Sanders in Adair County, Missouri. This variety is acorn-shaped and can grow up to 6 inches long. Sometimes called Thelma Saunders Squash. ~ 175 seeds/ounce.