Wolfsbane by C. Hebert

Wolfsbane: A beautiful yet poisonous plant; a soft lavender flower that lures unsuspecting wanderers in with its charming allure and mystery. The flower’s silky petals bloom only at night, beneath the light of the moon, and release the most pleasant yet toxic aroma that quickly enters the body and kills within minutes. Once the wolfsbane flower entraps you, there is no breaking its grasp.
It is absolutely and unmistakably deadly.