Known as the "Mushroom of Immortality" in Chinese medicine. Used for 2,000 years in both china and Japan. It improves the liver, boosts the immune system, strengthen the heart, calm your nerves, anti-cancer etc. etc.
The mushroom contains hundreds of unique bio-active compounds with new ones being discovered each year. https://www.majesticherbs.com/ganoderma-lucidum-mushrooms-red-reishi-lingzhi/
It is used in teas as an extract because it is mostly indigestible with a bitter taste. I comes in a variety of colors, blue/green Reishi, red Reishi, yellow Reishi, white Reishi, black Reishi, and purple Reishi. Each one has unique qualities but the Red is considered the "Most Prized".
The mushrooms on this tree have been here for awhile. At least 2 years or longer. I will just leave it and see how long it will last. In the mean time with this discovery I will find out more about this Fungi and try some store bought tea made from it. What the heck, I'll give Immortality a try..... :-)
More on the Reishi ..... https://draxe.com/reishi-mushroom/