Acokanthera – Acokanthera spp. (all parts toxic, except ripe fruit) Amaryllis – Amaryllis spp. Angel’s Trumpet – Datura spp., (leaves, seeds, flowers) Apricot – Prunus armeniaca (pits, leave and bark) Apple – Malus spp., (seeds, leaves, bark) Avocado – Persea Americana (pit, leaves, unripe fruit, stems) Azalea – Rhododendron canadenis Balsam Pear, Bitter Melon – Momordica charantia Baneberry – Actaea rubra, A. pachypoda Belladonna – Atropa belladonna Bird of Paradise – Poinciana and related spp. (seed pods and flowers) Bittersweet – Celastrus spp. Black Locust – Robinia pseudoacacia Boxwood – Boxus spp.Braken Fern – Pteridium aquilinum Buckthorn – Karwinskia humboldtiana and related spp. Burdock – Arctium spp. Buttercup – Ranunculus spp. Caladium – Caladium spp. Calla Lily – Zantedeschia aethiopica Catclaw Acacia – Acacia greggii (twigs and leaves) Caster Bean – Ricinus communis Cherry – Prunus spp. (pits, leaves and bark) Chinaberry – Melia azadarach Clematis – Clematis montana and related spp. Coral Plant – Jatropha mutifida Crocus (autumn) – Cholochicum autumnale Cycad or Sago Cycas – Cycas revoluta Daffodil – Narcissus tazetta Daphne – Daphne mezerum Death Camas – Zigadenus venenosus and other related species Delphinium – Delphinium spp. Devil’s Ivy – Epipremnum aureum Dieffenbachia (dumb cane) – Dieffenbachia spp. Eggplant – Solonum melongena (unripe/ripe fruit, leaves) Elderberry – Sambucus mexicana (roots, leaves, stems, bark) Elephant’s Ears or Taro – Colocasia spp. Euonymus – Euonymus spp. (filit, bark, leaves) European Pennyroyal – Mentha pulegium Figs – Ficus spp. (sap) Four o’clock – Mirabilis jalapa Heliotrope – Heliotropium spp. (leaves) Henbane – Hyoscyamus niger Holly – Ilex aquifolium and related spp. (leaves, berries) Horse Chestnut – Aesculus hippocastanum and related spp. Horse Nettle – Solanum carolinense Hyacinth – Hyacinthus orientalis Hydrangea – Hydrangea spp. Iris – Iris spp. Ivy (Boston, English and some others) – Hedera spp. Jack-in-the-Pulpit – Arisaema spp. Jerusalem Cherry – Solanum pseudocapsicum and related spp. (leaves, seeds and flowers) Jonquil – Narcissus jonquilla Juniper – Juniperus spp. Lantana – Lantana camara Larkspur – Delphinium spp. Laurel – Kalmia spp. Lily-of-the-Valley – Convalleria majalis Lobelia – Lobelia spp. Locoweed – Astragalus spp. and Oxytopis spp. Lupine – Lupinus spp. Marijuana – Cannabis sativa Milkweed – Asclepias spp. Mistletoe – Phoradendron villosum Mock Orange – Philadelphus spp. Moonseed – Menispermum canadense Monkshood – Aconitum spp. Morning Glory – Ipomoea violacea (seeds) Mushrooms – Amanita spp. And many others Narcissus – Narcissus spp. Oak – Quercus spp. Oleander – Nerium oleander Peach – Prunus persica (leaves, pit, bark) Pear – Pyrus spp. (leaves, seeds, bark) Peony – Paeonia officinalis Periwinkle – Vinca minor, Vinca rosea Peyote – Lophophora williamsii Philodendron – Philodendron spp. and Monstera spp. Plum – Prunus spp. (leaves, pit, bark) Poison Hemlock – Conium maculatum Poison Ivy – Toxicodendron radicans, includes T. rydbergii Poison Oak – Toxicodendron querciflium and T. diversilobum Poison Sumac – Rhux vernix Poinsettia – Euphorbia pulcherrima Poppy – Papaver somniferum and related spp. Pokeweed – Phytolacca Americana Potato – Solanum tuberosum (sprouts, leaves, berries, green tubers) Pothos – Eprimemnum aureum Primrose – Prmula spp. Privet – Ligustrum vulgare Ragwort – Senecio jacobea and related spp. Red Maple – Acer rubrum Rhododendron – Rhododendron spp. Rhubarb – Rheum rhabarbarum (leaves) Rosary Pea – Abrus precatorius Sage – Salvia officinalis Shamrock Plant – Medicago lupulina, Trifolium repens, Oxalis acetosella Skunk Cabbage – Symplocarpus foetidus Snowdrop – Galanthus nivalis Sorrel – Rumex spp., Oxalis spp. Spurges – Euphorbia spp. Star of Bethlehem – Ornithogalum umbellatum Sweet Pea – Lathyrus odoratus Tobacco – Nicotiania spp. Tomato – Lycopersicon esculentum (stems and leaves) Tulip – Tulipa spp. Virginia Creeper – Panthenocissus quinquefolia Vetches – Vicia spp. Water Hemlock – Cicuta spp. Waxberry – Symphoricarpos albus Wisteria – Wisteria spp. Yew – Taxus spp.