Wolfsbane Petals are an extremely rare ingredient. Only one plant grows in all of Solstheim, at the summit of Hvitkald Peak in the Moesring Mountains [-25,23]. A single sample can also be found at Lassnr's house in the Skaal Village. A sample is needed for the Rite of the Wolf Giver quest in order to cure yourself of Lycanthropy.
 About Wolfsbane
Wolfsbane, scientific name, Aconitum lycoctonum, is a flower of the type Aconitum and was used in history to poison wolves (hence wolfs-bane).