I've had a similiar problem. Pumpkins are cucurbits and do have male and female flowers
. It is very easy to distinguish the two. The males are just a slender flower
sprouting from a stem and the females flower
sit on top of a "ball" (embryonic fruit), that comes out of the stem. You may try hand-pollinatining, just take a q-tip or small brush and rub the inside of the male flower
and then immediately rub onto the insides of a female flower
. I usually just pick the male flower
and pull off the petal and then rub that all over the inside of the female. I don't know if you will have enough time left in your season for fruiting though. But if you're just looking for info, then that isn't a concern.
Also, with your seeds
coming from a jack o'lantern you run the chance of the seeds
being hybrid. Since pumpkins are cucurbits they can cross with other cucurbits: zucchini, squash, cucumbers, gourds, and of course, other types of pumpkins. A lot of these combinations may not be viable crosses. Meaning that some of these cross may not germinate, flower
properly, or be able to set fruit.
I think the latter is what has happened with my seeds
. It's just a messed-up cross. It's very irritating to have a 25 foot vining pumpkin with nothing on it.