Basically they can be divided into Zucchini Pumpkins and winter Pumpkins (Squash)..
The zucchini pumpkin belongs to the kind Cucurbita Pepo, we eat the tender fruit (no mature) and the masculine flowers.
The winter pumpkins belong to the kinds Cucurbita maxima and Cucurbita moscata. The first variedly has spheroidal fruits with variously colored peel with sweet yellow pulp.
The Cucurbita moscata is differ from the Maxima because of the lengthened fruit and consistent orange pulp.