These plants are dangerous to dogs

Following is a list of plants that are dangerous to dogs that we all should be familiar with.  (Thank you Assistance Dogs @ Yahoo Groups)

Autumn crocus (Colchicum): Its active ingredient, colchicines, triggers an anti-metabolic effect that can cause rapidly dividing cells, shedding of the gastrointestinal tract, bloody diarrhea, and vomiting.

Azalea (Rhododendron): This popular plant can harm a dog's cardiovascular system and trigger vomiting or gastrointestinal upset.
 

Daffodil (Narcissus): Toxic ingredients in the bulbs cause convulsions, tremors, lethargy, weakness, and upset stomachs.

Hyacinth (Hyacinth): This popular plant can cause severe vomiting, bloody diarrhea, depression, and tremors.

Japanese yew (Taxis): Extremely toxic to dogs, this group of ornamental plants can cause seizures or cardiac failure. The plant and red berries are toxic.

Lily of the valley (Convalaria): This plant can cause heart failure, coordination problems, and vomiting.
 

Oleander (Nerium): Extremely toxic, this popular outdoor plant contains cardiac glycosides that harm the heart, decrease body temperature, cause abnormal pulse rate, and can cause death. Beware: Even people have died from eating hot dogs roasted on an oleander twig.

Rhubarb (Rheum): Although the stalks are used to make pies, the leaves pack the potential to cause kidney damage.

Sago palm (Cycads): Resembling an upside down pineapple, this plant thrives in sandy soils, especially in warmer states such as California, Texas, and Florida. A few seeds can kill a dog.

Tomato (Lycopersicion): Surprisingly, the greenery of this common plant, not the tomato itself, contains solanine, a toxic ingredient that can prompt gastric upset, depression, weakness, and a decrease in heart rate.