contain toxic phorbol esters typical of the Euphorbiaceae . Mayapple ( Podophyllum peltatum ) . Green portions of the plant, unripe fruit, and especially the rhizome contain the non-alkaloid toxin podophyllotoxin , which causes diarrhea, severe digestive upset. Monkshood . See Aconitum . Moonseed . The fruits and seeds are poisonous,