The Oregon Poison Control Center in Portland lists the following plants as poisonous: amaryllis, azalea, sand begonia, bird of paradise, Calla lily, carnation, Christmas cherry, daffodil (including paperwhite narcissus), dieffenbachia
, English holly and ivy, geranium, horse chestnut, hyacinth, hydrangea, iris, jack-in-the-pulpit, Jerusalem cherry, juniper, larkspur, laurel, lily-of-the-valley, mistletoe, oxalis, philodendron, rhododendron, spathe flower, string of pearls, tulip and yew tree.
Achieving similar results, two interior plants from the Dieffenbachia
family used per 100 square feet of space, also help reduce air pollutants.
Four and one-half acres were richly landscaped with mammoth climbing philodendron, large dieffenbachia
, red, droopy-tongued chenille plants, and clumps of bamboo and coconut palm trees.
Among those closely related to the voodoo lily -- and most familiar to North American houseplant collectors -- are members of the genuses Dieffenbachia
, Philodendron and Monstera.