What is "grifola"

Grifola is a genus of fungi in the family Meripilaceae, which includes some edible fungi such as Grifola frondosa, commonly known as hen-of-the-woods (or Maitake in Japan); not to be confused with Laetiporus sulphureus, known among English speakers as chicken of the woods. The genus was circumscribed by Samuel Frederick Gray in 1821.