| Common Name | Scientific Family | Toxic Parts | Signs |
| Angel's Trumpet | Datura species | Whole plant | Thirst, hallucinations, vision disturbances |
| Autumn Crocus | Colchicum autumnate species | Whole plant | Vomiting, diarrhea, burns mucus membranes |
| Azalea | Rhododendron species | Leaves, flowers | Vomiting, diarrhea, burns mucus membranes, salivation, low blood pressure, decreased heart rate |
| Belladonna Lily | Amaryllis species | Bulbs | Vomiting, diarrhea, decreased blood pressure liver damage, depression |
| Bittersweet | Celastrus species | Weed, vine, mature (red) berries | Vomiting, diarrhea, fever |
| Bleeding Heart | Dicentra species | Roots, leaves | Vomiting, diarrhea, seizures, paralysis |
| Castor Bean | Ricinus communis | Seeds | Vomiting, diarrhea, abdominal pain, thirst |
| Chinaberry tree | Melia azedarach | Bark, fruit | Vomiting, diarrhea, confusion, staggering |
| Christmas Rose | Helleborus niger | Whole plant | Vomiting, diarrhea, abdominal pain, mouth pain, low blood pressure |
| Daphne | Daphne mezereum | Whole plant | Selling and ulceration of lips and mouth abdominal pain, drooling, vomiting, thirst bloody diarrhea |
| Delphinium or Larkspur | Delphinium species | Seeds, leaves | Weakness, drooling, salivation |
| English Holly | Ilex species | Fruit | Vomiting, diarrhea |
| Foxglove | Digitalis purpurea | Whole plant | Vomiting, diarrhea, abdominal pain, decreased heart rate, cardiac irregularities |
| Golden chain | Laburnum anagyroides | Whole plant | Vomiting, weakness, incoordination increased heart rate, depression |
| Horse Chestnut or Buckeye | Aesculus species | Nuts, twigs | Vomiting, diarrhea, dehydration |
| Iris | Iris species | Whole plant | Vomiting, diarrhea, abdominal pain |
| Irish Potato | Solanum tuberosum | Vines, green skin, sprouts | Drooling, diarrhea, weakness, decreased heart rate, low blood pressure |
| Jack-in-the-Pulpit | Arisaema triphyllum | Entire plant | Swelling and inflammation of tonsils, mouth structure, drooling |
| Lantana | Lantana camara | Leaves, immature berries | Vomiting, diarrhea, weakness decreased respirations |
| Lily Easter and Tiger Lily | Lilium & Hemerocallis species | Whole plant | Kidney failure, decreased or absent urination, vomiting |
| Lily of the Valley | Convallaria majalis | Seeds, flowers, leaves | Vomiting, diarrhea, abdominal pain decreased heart rate |
| Lupine | Lupinus species | Seeds, leaves | Drooling, seizures, respiratory difficulty, weakness |
| Mistletoe | Phoradendorn species | Leaves, stems, berries | Vomiting, diarrhea, abdominal pain, shock |
| Monkshood | Aconitum species | Entire plant | Vomiting, drooling, decreased heart rate |
| Moonseed | Menispermum canadense | Fruit | Seizures |
| Morning Glory | Ipomoea purpurea & tricolor species | Seeds | Vomiting, diarrhea, hallucinations |
| Mountain laurel | Kalmia species | Leaves, flowers | Vomiting, diarrhea, drooling, weakness, vision disturbances |
| Narcissus, Daffodil | Narcissus species | Bulb | Vomiting, diarrhea, low blood pressure |
| Nettle | Urtica diocia | Hairs on leaves | Drooling, swelling and pain in mouth, oral irritation |
| Oleander | Nerium oleander | Whole plant | Vomiting, diarrhea, abdominal pain, low heart rate, heart irregularities |
| Philodendron | Monstera & Philodendron species | Leaves | Swelling of mouth, tongue, lips |
| Poinsettia | Euphorbia pulcherrima | Sap of stem, leaves | Vomiting, mouth, skin irritation |
| Rhubarb | Rheum rhaponicum | Leaves | Vomiting, diarrhea, kidney failure |
| Rosary Pea or Precatory Bean | Abrus precatorius | Seeds | Vomiting, diarrhea, weakness kidney failure, coma, death |
| Thron Apple or Jimsonweed | Datura stramonium | Whole plant | Thirst, vision disturbances delirium |
| Tobacco | Nicotiana tabacum | Whole plant | Vomiting, drooling, tremors incoordination, collapse, respiratory failure |
| Wisteria | Wisteria species | Whole plant | Vomiting, abdominal pain |
| Yellow Jessamine | Gelsemium sempervirens | Flowers | Seizures, abdominal pain paralysis |
| Yew | Taxus cuspidata & Taxus baccata | Whole plant except ripe fruit | Sudden death, trembling, collapse, heart irregularities |