Pumpkins.

Pumpkin is the fruit of the species Cucurbita pepo or Cucurbita mixta. It can refer to a specific variety of the species Cucurbita maxima or Cucurbita moschata, which are all of the genus Cucurbita and the family Cucurbitaceae.

Since some squash share the same botanical classifications as pumpkins, the names are frequently used interchangeably. In general, pumpkin stems are more rigid, prickly, and angular (with an approximate five-degree angle) than squash stems, which are generally softer, more rounded, and more flared where joined to the fruit.

picture: http://www.chicagonow.com/blogs/wisconsin-dells-schools-out/2010/09/pumpkin-picking-possiblities.html

The word pumpkin originates from the word pepon (πέπων), which is Greek for “large melon". The French adapted this word to pompon, which the British changed to pumpion and later American colonists changed that to the word we use today, "pumpkin". The origin of pumpkins is not definitively known, although they are thought to have originated in North America. The oldest evidence, pumpkin-related seeds dating between 7000 and 5500 B.C., were found in Mexico. Pumpkins are a squash-like fruit that range in size from less than 1 pound (0.45 kilograms) to over 1,000 pounds (453.59 kilograms).

information: http://en.wikipedia.org/wiki/Pumpkin