Pumpkins contain seeds and they’re classified as fruits. They belong to the gourd family known as Cucurbitaceae.
Cucurbitaceae family consists of Cucurbita (pumpkins, Winter & Summer squashes), Lagenaria (calabash or bottle gourd), Citrullus (watermelons), Cucumis (cucumbers) and Luffa (loofah).
The most known Cucurbita species:
–Cucurbita argyrosperma (Japanese pie pumpkin or cushaw pumpkin)
–Cucurbita ficifolia (Figleaf gourd)
–Cucurbita moschata (Aehobak, Butternut squash, Calabaza, Dickinson pumpkin, Giromon, Golden Cushaw, Loche, Long Island cheese pumpkin, Musquée de Provence or
–Cucurbita maxima (giant pumpkins, we all know from the county fairs, but also: Arikara squash, Banana squash, Boston marrow, Buttercup squash, Candy Roaster squash, Hubbard squash, Jarrahdale pumpkin, Kabocha, Lakota squash, Nanticoke squash, Turban squash).
Please note: Cucurbita maxima originated from Cucurbita andreana.
–Cucurbita pepo (regular sugar & carving pumpkins, ornamental squashes like acorn and patty pan squash, various Summer & Winter squashes like Spaghetti and Delicata Squash).
Check the main differences between Summer and Winter squashes here.