As a child, I picked out the round pebbly pieces of popcorn from the bowl, not knowing they had a name. After 80 plus, I was delighted to learn that Free Day sells bags of Mushroom popcorn, although, to me, it more nearly resembles cauliflower. But that probably wouldn't sell. Only wish it had fewer hulls.
This is by far the best yellow popcorn I have made. I use a silicon popcorn bowl in the microwave and use different oils, salts, and seasonings. The popcorn stays crunchy after 10 minutes, and there are very few unpopped kernels. I would highly recommend this to anyone. Now, I want to try their other kernels.