Swedish kurbits folk pattern. Winter Carl Hansson’s painting from 1797 in the Zorn Museum in Mora. As appears in Svante Svärdströms book Dalmålningar i urval, Stockholm 1975.
National Museum of Finland’s caption on its website says (roughly translated from Swedish):
The huge gourd represents Dala painters successor idea of the vineyard luxuriance and magnificence in the 20th chapter of Matthew.