Common Name | Botanical Name | Details |
St. John's Wort | Hypericum perforatum | Harmful if eaten in quantity. |
Sweetpea | Lothyrus odoratus | Harmful if eaten in quantity. |
Swiss Cheese Plant | Monstera deliciosa | Causes diarrhea and oral irritation if eaten. May cause dermatitis. |
Taro Vine | monstera deliciosa | Causes diarrhea and oral irritation if eaten. May cause dermatitis. |
Tiger Lily | Lillium | (Especially poisonous to cats) |
Tobacco Plant (leaves) | Nicotiana | Harmful if eaten in quantity. |
Tulip | Tulipa species | Harmful if eaten in quantity. May cause a skin allergy. |
Umbrella Plant | Schiefflera | Toxic if eaten, causing vomiting and diarrhea. |
Varnish Tree | Toxicodendron vernicifluum | Poisonous. Can cause severe blistering dermatitis if they come into contact with the skin. |
Water Hemlock | Cicuta maculata | Violent painful convulsions Can Be Fatal |
Wax Tree | Toxicodendron succedaneum | Poisonous. Can cause severe blistering dermatitis if they come into contact with the skin. |
Wild Cherry tree (twigs & foliage) | Prunus avium | Gasping, excitement, prostration Can Be Fatal |
Windflower | Anemone species | Harmful if eaten in quantity. |
Wisteria (pods & seeds) | Wisteria | Nausea, repeated vomiting, stomach pains, severe diarrhea, dehydration and collapse. |
Wolfsbane | Aconitum septentrionale | Toxic if eaten, causing nausea and vomiting. |
Woody Nightshade | Toxic if eaten, causing nausea and vomiting. | |
Yew (berries & foliage) | Taxus species | Dizziness, dry mouth and mydriasis develop within one hour, followed by abdominal cramping, salivation and vomiting. Foliage is more fatal than berries. Death can be sudden and without warning Can Be Fatal |