Have you heard of ARKA (Calotropis porcera)?
This shrub is widely found throughout Western Australia. It is declared as a pest in Western Australia see www.acric.wa.gov.
Calotropis grows in warm areas, desert, wasteland and sandy soil.
Charaka opined that a deadly poison can become a very good medicine if it is administered properly on the other hand even the most useful/ safe medicine can act like a poison if handled incorrectly.