Gourds and luffa are examples of cucurbits we don’t eat, but they still have uses. Technically, gourds can be eaten. They produce edible fruits, but most people don’t think they’re very good.

Natural loofah sponges actually come from the fruits of vine-growing Luffa plants. These plants are part of the gourd family (Cucurbitaceae) making them relatives of watermelons, cucumbers and ...