Hi MisterTang...I grew these in California and had them shipped over when I moved to Florida. They are a hybrid of St. Thomas and Bounce mushrooms when we were grafting experimentally about 5 years ago. This was our result and never came up with a clever name for them and this is the one remaining colony that I am aware of. Most of my mother colonies are at a shop in California called California Aquariums https://www.caliaquariums.com/
I can see if they have some of my other varieties and be more than happy to share some specimens with you!