Thirty minutes. According to Baidu Encyclopedia, Paecilomyces is a low-fat and low-cholesterol food, which can be eaten by stewing with proper amount of salt for 30 minutes. The scientific name of black palm fungus is Ziziphus jujuba, which is one of the famous export edible fungi. Its thallus is thick and fat, its meat is tender, it is rich in extracellular polysaccharide, it is not easy to be broken and it is rich in nutrition.