There is no known scientific study on the longevity of the fungus, but this forager has been gathering Dryad's Saddle from the same stump for eight years, and it is still producing new growths. Common sense says they will appear every year until the nutrients run out, but it is impossible to say how long that will be for each tree and fungus. Anecdotally, it seems Dryad's Saddle is a slow parasitic growth and can maintain its development for a long time.