Daffodil: Ingestion by dogs causes severe gastrointestinal illness, diarrhea, vomiting, convulsions, seizures, low blood pressure and tremors. Larger amounts can cause a cardiac arrhythmia.
- Daphne: An ornamental shrub with poisonous leave, berries and bark.
- Death Camas: This is a field herb with poisonous flowers, seeds, stem and and leaves.
- Delphinium (Larkspur): A wildflower where every part is toxic to dogs. Symptoms are vomiting and canine diarrhea.
- Devil's Ivy
- Dumbcane: This entire houseplant is dangerous for dogs to ingest.
- Deadly Nightshade (See Nightshade)
- Diffenbachia: Symptoms of Diffenbachia poisoning gastrointestinal upset, breathing problems, difficulty swallowing, swelling around the mouth.
- Dologeton: Symptoms of Dologeton vary based on the amount consumer and dog sensitivity.
- Dumbcane: Symptoms such as irritation around the mouth, swallowing difficulty, respiratory difficulty, gastrointestinal problems.
- Dutchman' breeches: A garden flower with toxic foliage and roots.
- Easter Cactus: Ingestion causes vomiting, diarrhea and depression.
- Elderberry: Elderberry is a tree with dog poisonous leaves, bulbs, roots and bark.
- Elephants Ear: The entire house plant is toxic for dogs. Symptoms are stomach upset, breathing problems, trouble swallowing, mouth swelling. It can also cause vomiting, cramps, and possibly tremors and heart issues.
- Emerald Duke: Same as elephant's ear in terms of dog toxic plants symptoms.
- Emerald Feather (aka Emerald Fern)
- Emerald Fern (aka Emerald Feather)
- English Holly: Symptoms of English Holly poisoning in dogs vomiting, abdomen pain and diarrhea.
- English Ivy: (branching, glacier, needlepoint, sweetheart California): These ivy varieties are all dog poisonous plants. They contain the toxin triterpenoid saponins. Symptoms include gastrointestinal problems (diarrhea, abdominal pain) and hypersalivation.
- English Yew: Symptoms in dogs are diarrhea, abdomen pain and vomiting.
- False Flax: A wild herb with dog poison seeds.
- False hellebore: An ornamental flower with poisonous roots, leaves and seeds.
- Fan Weed: Wildflower and herb with seeds that are toxic to dogs.
- Field peppergrass: A herb and wildflower with canine poisonous leaves.
- Fiddle-Leaf Philodendron
- Flamingo Plant
- Florida Beauty
- Foxglove: Garden and wild flower with poisonous leaves. Symptoms associated with Foxglove are diarrhea and vomiting.
- Fruit Salad Plant
- Glacier Ivy: Symptoms are similar to other dog toxic plants that are in the Ivy family such as vomtiing, diarrhea, abdomen pain, heart problems, respiratory problems and tremors.
- Glory Lily
- Gold Dieffenbachia
- Gold Dust Dracaena
- Golden Pothos
- Green Gold Nephthysis
- Ground Cherry: Symptoms of Ground Cherry dog toxic plants poisoning in dogs is diarrhea and vomiting.
- Hahn's self branching English Ivy
- Heartleaf Philodendron: Causes swelling around the dog's mouth, stomach upset, respiratory problems, trouble swallowing, irritation and swelling around the mouth.
- Heavenly Bamboo
- Poison Hemlock and Western Water Hemlock
- Holly: A shrub with dog poisonous berries that cause intense vomiting, diarrhea, depression.
- Horse Chestnuts: This tree has nuts and sprouts that are toxic for dogs. Symptoms are diarrhea, abdomen pain and vomiting.
- Horsehead Philodendron
- Horse nettle: A wildflower and herb where the berries and all parts of the plant are toxic.
- Hurricane Plant
- Hyacinth: A wild and house plant where the bulbs can cause intense symptoms associated with dog toxic plants poisoning such as vomiting, diarrhea, depression and tremors)
- Indian Turnip: Symptoms in dogs from eating this plant include diarrhea and vomiting.
- Indian Tobacco: Diarrhea and vomiting are symptoms in dogs associated with Indian Tobacco.
- Iris: This is a garden and wild flower that has toxic leaves and roots.
- Jack-in-the-pulpit: This plant irritates the mouth, causes swelling around the mouth, breathing problems and gastrointestinal upset.
- Jade: Causes slow heart rate, muscle coordination issues (ataxia), depression and vomiting in dogs.
- Jack in the pulpit: A wildflower where the entire plant is dangerous for dogs to ingest.
- Japanese plum: The Japanese plum causes symptoms in dogs such as diarrhea, abdomen pain and vomiting.
- Japanese Show Lily
- Japanese Yew (also called Yew)
- Jerusalem Cherry: An ornamental plant where the foliage and unripe fruit is toxic for dogs. Symptoms in dogs includes vomiting, painful stomach, stomach cramps, tremors, respiratory issues, heart problems and kidney problems.
- Jimson Weed: A field plant where the seeds and entire plant are dog plant poisons.
- Kalanchoe: Like other dog poisonous plants, this plant causes gastrointestinal distress and well as heart problems such as problems with the rhythm and dog heart rate.
- Laburum: An ornamental plant with dog poisonous seeds, flowers and pods.
- Lace Fern
- Lacy Tree
- Lantana: A house plant with dog plant toxic foliage.
- Larkspur: A wildflower that is toxic to dogs when the plant is young. Specific symptoms associated with these dog toxic plants include vomiting and diarrhea.
- Laurels: A shrub with dog poisonous leaves.
- Lillies (Lilum): Symptoms occur several hours after ingesting the plant. Symptoms include lethargy, low appetite, vomiting, diarrhea, depression, kidney failure in 36 hours to 72 hours)
- Lily of the Valley (Convallaria majalis): When a dog ingests Lily of the Valley leaves and flowers, it can cause diarrhea, vomiting, weakness, confusion, heart cardiac dysrhythmias. It can also cause death.
- Locoweed: This family of dog toxic plants is a hallucinogenic in dogs.
- Lupines: The pods and seeds of this shrub are dog toxic parts of this plant.
- Macadamia Nut
- Machineel Tree: The sap and fruit of this tree are toxic to dogs.
- Madagascar Dragon Tree
- Malanga: In dog malanga poisoning a dog will experience swelling or irritation around the mouth, trouble swallowing and breathing issues.
- Majesty: Symptoms in dogs include digestive problems, respiratory problems, trouble swallowing, mouth swelling.
- Marble Queen: Same symptoms as Majesty above.
- Marijuana: (hemp, hashish, hash): Dogs tend to avoid marijuana. It has a relatively low level of toxicity. Eating cannabis can effect the dogs central nervous system and result in a lack of coordination, diarrhea, drooling, fast heart beat, seizures and coma. Like humans, marijuana is a hallucinogenic.
- Matrimony vine: An ornamental vine that has toxic leaves and shoots.
- Mayapple: This is a wildflower that has unripe fruit, roots and foliage that are toxic to dogs.
- Mauna Loa Peace Lily (also called Peace Lily)
- Mexican Breadfruit
- Mild vetch: This entire wildflower is poisonous to dogs.
- Mistletoe "American": The berries of this plant cause vomiting and diarrhea, difficulty breathing, collapse, erratic behavior, hallucinations and death)
- Mock Orange: Symptoms of this family of dog toxic plants in dogs are vomiting, abdomen pain and diarrhea.
- Monkey pod: Same as mock orange in terms of dog symptoms.
- Monkshood: Monkshood is a wildflower with poisonous roots and seeds in particular, but all parts are considered toxic.
- Moonseed: The fruit and roots of this vine are toxic to dogs.
- Morning Glory: The seeds and roots of this wildflower are poisonous to dogs. This is an hallucinogenic in dogs.
- Mother-in-Law: The Mother-in-Law causes symptoms in dogs such as trouble swallowing, respiratory problems, stomach upset and mouth swelling.
- Morning glory: The morning glory is a wildflower with poison seeds and roots.
- Mountain mahogany: This is a shrub with canine poisonous leaves.
- Mulch with Cocoa Beans mixed in (hyperactivity, muscle twitching, increased urination, excessive panting, increased heart rate and blood pressure levels, seizures)
- Mustards: Mustard is a wildflower with poisonous seeds.
- Narcissus: The narcissus has a bulb which is poisonous to dogs.
- Needlepoint Ivy: Symptoms of Ivy dog toxic plants vary but can include vomting, mouth swelling, difficulty swallowing, abdomen pain, cramps, tremors and heart problems.
- Nephthytis: Symptoms in this family of toxic dog plants includes mouth swelling, trouble when the dog swallows, breathing problems, and gastrointestinal upset.
- Nicotiana: Another garden flower with toxic leaves.
- Nightshade: A wildflower with toxic berries and leaves. Symptoms in dogs include vomiting, painful abdomen, cramps, tremors, heart issues, breathing difficulty and kidney problems.
- Nutmeg: Nutmeg is a hallucinogenic in dogs.