When carving into my pumpkin I found a sprout

While making my stuffed pumpkin I found three seeds that had sprouted. This was because the pumpkin got to warm while in transit. So I planted one using some of the pumpkin guts as fertilizer. Lets see how these ones grow. It looked to me to be a Big Rock, but since it was only labeled large pumpkin, I cant properly identify it. 

When I have the money and chance I will purchase seeds of every pumpkin and look for identify features. Then also identifying features of the pumpkin as they grow.