1. What kind one of mushroom in real life are the KCD’s cave mushroom?
I just curious for it, but if anyone knows it, that would be great. 
2. Cave mushroom can’t be regenerated?
I know I can go to some stores to buy Cave Mushroom, but I just curious:
I tried to take a cave mushroom and then skip time to waiting for itregenerated. I have tried skip for 10 days, but it never regenerated, so I want to ask if cave mushroom can’t be regenerated?