Gelsemium elegans

Gelsemium elegans, commonly known as heartbreak grass, is a poisonous plant of the family Gelsemiaceae found in China and other Asian countries. It contains toxic alkaloids such as gelsemine, gelsenicine, gelsevirine, koumine and 14-Hydroxygelsenicine. Crumbled leaves of this plant, surreptitiously added to food, were used in the 23rd of December 2011 poisoning of Long Liyuan, a magnate of the Chinese timber industry, and perhaps in the 10th of November 2012 poisoning of Alexander Perepilichny, a Russian financier cooperating with a fraud investigation in London, though the role of the plant in his death has been disputed....read more on Wikipedia.