Though beautiful, it is quite toxic. Flowering Tobacco - An annual that produces fragrant, tubular flowers that drape from branches. Flowers come in pink, purple, red, white and yellow. Chris Starbuck, MU associate professor of horticulture, said that symptoms ranging from nausea and vomiting to coma and death can occur by ingesting even a small amount of some species. Oleander - The leaves and branches contain a heart stimulant that is similar to digitalis and can cause death.
Small amounts can cause severe digestive pain.
Daphne - Ingesting the berries can be fatal. Just a few berries can kill a child. All parts of these species are poisonous and can cause nausea, vomiting, depression, difficult breathing, coma and death. Yew - Both berries and foliage are toxic and can cause sudden death. Starbuck said gardeners should treat all unknown plants with respect and teach their children not to eat plants in general.