All parts of the evergreen spindle are considered toxic if ingested in large quantities. Symptoms can range from mild to life-threatening including vomiting, weakness, diarrhea, chills, convulsions, and coma. Since these plants are commonly used as ornamental hedges, you should be mindful of any children who may encounter the plant, be attracted by its colorful leaves and flowers, and may be tempted to eat them.

Evergreen azalea are members of the Rhododendron genus, all of which contain varying levels of a toxin known as Grayanotoxin in all tissues. Physical contact can cause a rash in sensitive people, the pollen can irritate mucus membranes, and ingesting it can cause nausea, vomiting, arrhythmia, low blood pressure, and hallucinations in humans. Grayanotoxin is so strong that even the amounts contained in honey made from Rhododendron pollen can have negative effects.

Golden dewdrops (Duranta erecta) is an ornamental sprawling shrub commonly found in subtropical and tropical gardens all over the world. Its gentle purple blossoms are often visited by butterflies and hummingbirds. Golden dewdrops is considered a weed in Australia, South Africa and certain parts of East Asia.

The Zephyranthes candida is a rain lily that can be found in South America as well as in parts of Africa, Asia, Europe and North America where it has been naturalized. Its stunning white flowers bud late in August. They're called rain lily because they often flower after heavy rains.

Native to the Mediterranean, the italian arum is cultivated as an ornamental plant and has been naturalized in a variety of places, including the Caucasus region, Argentina, and the United States. The berries and leaves are considered to be poisonous and should avoid ingesting.

Durian (Durio zibethinus) is a tropical plant from Southeast Asia. It bears large, spiny, edible fruit which has become a major export crop of the region. The fruit is best known for its pungent smell, which provokes opposing reactions, ranging from near-addiction to revulsion. In some areas, it has even been banned from public transport and hotels.

All parts of common columbine, including the stem, leaves, flowers, and seeds, are toxic when they are ingested raw. Contact with the plant's sap may also lead to dermatitis (skin irritation and inflammation). The symptoms from common columbine poisoning are likely to cause only mild to moderate effects, but the symptoms are not well-known, since there are few documented cases of it. Adverse effects are most likely to occur from accidental ingestion.

Japanese pieris (Pieris japonica) is an evergreen shrub that produces chains of small flowers. But be careful, it can cause seizures and temporary blindness if consumed by animals or people. Even so, is sometimes grown in the foundation portion of gardens along with other shrubs.

Smoketree is a deciduous tree native to Southern Europe and Central China. The flowers of the smoketree are pinkish-purple and long-lasting. They grow in clusters along branches and give a smoky appearance to the tree when in bloom. In China, they are used as important fall decorations due to their foliage turn bright red in the fall.

Flame lily (Gloriosa superba) is a climbing flowering plant also known as the tiger claw, fire lily, and creeping lily. Flame lily attracts sunbirds and butterflies. This plant is extremely toxic when ingested.

Plants of genus Buxus are widely present around the world as а hedge or garden ornamental plants, but they contain alkaloids, most notably buxin, which are toxic to animals.

Plants of the Asclepias syriaca genus are extremely toxic to dogs—immediate veterinary attention should be sought if your dog has consumed anything of this type. Toxins are found in all parts of the plant. Symptoms of poisoning from common milkweed include weakness, dilated pupils, vomiting, and diarrhea. In more serious cases, these symptoms may progress towards difficulty breathing, an elevated heart rate, organ failure, coma, or death.

Barbados lily (Hippeastrum puniceum) is a perennial that grows from a bulb and will grow from 30 to 46 cm tall. A prolific bloomer, it blooms most months of the year with large, 15 to 30 cm long, orange flowers. It thrives in full sun to partial shade and prefers slightly acidic soil. Goes dormant after blooming.

Many species within the Cycas revoluta genus are highly toxic to dogs - if you suspect your dog has ingested any part of a sago palm plant, you should contact a vet immediately. The Sago palm is a very common ornamental and is the most common culprit. These plants contain high concentrations of the cycasin toxin, which is found throughout their structures but is most concentrated in their seeds. Ingesting even a small amount of cycasin can cause vomiting and diarrhea. Larger amounts can cause damage to the intestines and liver, coma, or death.

Indian poke (Phytolacca acinosa) is a perennial shrub with deep red or purple berries. The genus name for this species comes from a Greek word for “plant” and a Latin word that means “dye,” and a look at the berries makes the reason obvious. Its mature leaves and stalks are poisonous.

True to this plant's reputation, consumption of surattense Nightshade can be extremely toxic to dogs, and warrants immediate veterinary attention. All parts of these plants contain several toxic substances which can cause loss of appetite, excessive drooling, vomiting, diarrhea, dilated pupils, confusion, behavioral changes, and weakness. In more severe cases, difficulty breathing, a lowered heart rate, coma, or even death may occur, so treat it as a medical emergency if your pet has come into contact with this plant.

True to this plant's reputation, consumption of black nightshade can be extremely toxic to dogs, and warrants immediate veterinary attention. All parts of these plants contain several toxic substances which can cause loss of appetite, excessive drooling, vomiting, diarrhea, dilated pupils, confusion, behavioral changes, and weakness. In more severe cases, difficulty breathing, a lowered heart rate, coma, or even death may occur, so treat it as a medical emergency if your pet has come into contact with this plant.

Dutchman's pipe is a hardy, deciduous vine that climbs trellises or walls and can provide privacy or shade with its dense, heart-shaped leaves. This vine grows small pipe-shaped flowers that give it its name. Dutchman's pipe attracts many swallowtail butterflies with its pretty little blooms.

True to this plant's reputation, consumption of jerusalem cherry can be extremely toxic to dogs, and warrants immediate veterinary attention. All parts of these plants contain several toxic substances which can cause loss of appetite, excessive drooling, vomiting, diarrhea, dilated pupils, confusion, behavioral changes, and weakness. In more severe cases, difficulty breathing, a lowered heart rate, coma, or even death may occur, so treat it as a medical emergency if your pet has come into contact with this plant.

The golden chain tree is used as an ornamental in gardens and patios. It gets its name from the cascading yellow flowers that bloom in late spring. The lumber can be used for cabinetry, inlay work, and musical instruments. The flexible branches also used to be important for making bows. The golden chain tree is toxic in its entirety and can be fatal if eaten.