Have you missed learning about plant poisons? Well, it’s your lucky day! Today is our first crossover of season three with our friend Matt Candeias of In Defense of Plants. In this episode we delve into the castor bean plant Ricinus communisand its two notorious products: castor oil and the star of the show, ricin. Join us as we learn about ricin’s storied history, which leads us through political assassinations and efficiency in engines, the biology of ricin, which horrifies us with its lethality, and finally, the ecology of the plant, which surprises us with its strategic partnerships.

Looking for more ways to cure your plant blindness? Check out In Defense of Plants at indefenseofplants.com and follow Matt on twitter @indfnsofplnts.