Holley said:

There are jack-o-lantern pumpkins and pie pumpkins. What is the
difference botanically?

Jack-o-lantern pumpkins are almost always a large orange squash from
the species Cucurbita pepo. These are cultivars selected for thinner walls
and long, strong stems (sometimes referred to as handles in seed-catalog
speak). Pie pumpkins can refer to other C. pepo squashes that have more
substantial or less stringy flesh and more flavor and sweetness. But
'pumpkin' for pies and other delicious dishes could well be squash from
other species, C. moschata (butternut and cheese* squash), C. maxima (Hubbard,
buttercup, banana and kabocha squashes) or C. mixta (cushaws). C. pepo squashes
include (in addition to pumpkins) delicata, acorn, spaghetti and summer sqashes.
[NOTE: this is not an exhaustive list, just some of the better-known types.]

*Called that because they resemble wheels of cheese. (I've grown them myself.)
--
Pat in Plymouth MI ('someplace.net' is comcast)

Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)