Garden Detective

University of Houston photo

The ASPCA issued a warning today about Brunfelsia, which you might recognize by one of its common names, "morning, noon and night plant" or "yesterday, today and tomorrow plant." Brunfelsia is a favorite in sun to partial-shade gardens in the south, and sports fragrant pansy-like flowers that start out purple then change to lavender within a day or two before fading to white a day or two after that (hence, the common names.) The warm-climate plant is suited for zones 9-11, but can be kept as a houseplant indoors or grown as an annual in cooler zones.

Problem is, according to a study by Dr. Safdar Khan, veterinary toxicologist for the ASPCA Animal Poison Control Center, the plant might kill your dog -- or a neighborhood dog that happens to wander by. Not only is the plant poisonous to dogs, but for some reason dogs are strongly attracted to it. A double whammy. Even eating a couple of seeds could prove disastrous.

Fourty-two dogs were treated by the APC from 2001 to 2006 after falling ill from ingesting parts of the plant. Three died. Symptoms included stiff limbs, excessive drooling and life-threatening seizures.

“Brunfelsia toxicity can progress very rapidly to a potentially lethal situation, so it’s critical that pet parents seek immediate veterinary care,” says Dr. Khan. “If pets consume any part of the plant, they can become ill within hours and develop gastrointestinal problems such as vomiting and diarrhea, as well as tremors, seizures and muscle rigidity that makes the animal appear to be in a ‘sawhorse’ stance.”

• More on poisonous plants

In honor of this week's Westminster Dog Show, it's a good time to think about the well-being of our pets, and an important part of keeping them healthy is keeping them away from harmful plants.

Cornell University photos Three toxic plants, from left, Lantana, Dogbane, Daphne.

Cornell University photo Digitalis (Foxglove)

Many houseplants, perennials and shrubs are toxic to animals, and different species are affected by different plants. (The lists below include the most common plants, and should not be considered entirely complete. In other words, please do not assume that a plant is safe just because a plant isn't listed here.)

Below are the 10 most common toxic plants, according to the Animal Poison Control Center of the ASPCA, and the symptoms associated with them.

Marijuana (Cannabis sativa): Central nervous system depression, loss of coordination, vomiting, diarrhea, drooling, increased heart rate, seizures and coma.

Sago Palm (Cycas Revoluta): Ingestion of just one or two seeds can induce vomiting, diarrhea, depression, seizures and liver failure.

Lilies ( Lilium spp.): Very small amounts can lead to severe kidney damage in cats.

Tulip/Narcissus bulbs (Tulipa/Narcissus spp): Gastrointestinal irritaion, drooling, loss of appetite, central nervous system depression, convulstions, cardiac abnormalities.

Azalea/Rhododendron (Rhododenron spp.): Vomiting, drooling, diarrhea, weakness, central nervous system depression, coma, cardiac collapse, death.

Oleander (Nerium oleander): Gastrointestinal irritation, abnormal heart function, hypothermia, death.

Castor Bean (Ricinus communis): Severe abdominal pain, drooling, vomiting, diarrhea, excessive thirst, weakness, loss of appetite, dehydration, muscle twitching, tremors, seizures, coma, death.

Cyclamen: Significant gastrointestinal irritation, intense vomiting, death.

Kalanchoe: Gastrointestinal irritation, serious cardiac rate and rhythm abnormalities.

Yew (Taxus spp.): Central nervous system abrnormalities, trembling, loss of coordination, difficulty breathing, death.

Other plants that are harmful to pets

Houseplants and tropicals

Caladium, Colocasia , Philodendron, Umbrella Plant, Aloe Vera, Mistletoe, Lucky Bamboo