1. Amaryllis
   Zinnia
2. Castor bean
   Waxflower

The castor bean is a perennial plant scientifically known as Ricinus communis. A plant found commonly in tropical regions, castor bean is toxic as a result of the presence of ricin.

1. Aster
   Violet
2. Tuberose
   Tobacco

A member of the Solanaceae family, the tobacco plant contains nicotine and harmala alkaloids. There are more than seventy species of tobacco in existence.

1. Snapdragon
   Sunflower
2. Star of Bethlehem
   Oleander

Scientifically known as the Nerium oleander, the oleander belongs to the dogbane family Apocynaceae. It is a small flowering tree commonly grown in gardens.

1. Poinsettia
   Wolfsbane
2. Tulip
   Pansy

Aconitum napellus, or wolfsbane, is found in mountainous and temperate regions of Europe. The plant owes its name to its historical use as a poison for wolves.

1. Statice
   Begonia
2. Doll's eye
   Amaryllis

Endemic to Eastern America and Canada, the doll's eye owes its name to its appearance. The flower, also known as the white baneberry, bears a white berry with a black scar.

1. Tea rose
   Zinnia
2. European yew
   Waxflower

The European Yew can be found in Europe, Africa and the Middle East. All parts of the plant, with the exception of the aril, contain taxine alkaloids, which are toxic.

1. Oriental lily
   Orchid
2. Marigold
   Angel's trumpet

The angel's trumpet is one of seven species in the Solanaceae family. The name angel's trumpet refers to the plant's flowers of white, yellow, pink, orange, green and red.

1. Larkspur
   Aster
2. Sunflower
   Jasmine

The flowers of the larkspur are deep purple or violet. A member of the Ranunculaceae family, the larkspur, or delphinium, is toxic to humans and animals.

1. Foxglove
   Violet
2. Tuberose
   Snapdragon

Foxgloves are scientifically known as digitalis. This species of plant grows in acidic soil and is very toxic.

1. Poinsettia
   Tea rose
2. Statice
   Suicide tree

The suicide tree is officially known as the Cerbera odollam. It produces a highly poisonous fruit that has been used for suicides and murder, resulting in its name.

1. Lilac
   Waxflower
2. Lily of the valley
   Amaryllis

Lily of the valley is a flowering woodland plant native to Asia and Europe. It produces white bell-shaped flowers that dangle from a stalk.

1. Begonia
   Rhubarb
2. Sunflower
   Orchid

A herbaceous perennial, rhubarb is a member of the family Polygonaceae. Its leaves contain a poisonous substance known as oxalic acid. The plant's red stalks, however, are edible and poison free.

1. Deadly nightshade
   Tulip
2. Zinnia
   Oriental lily

A plant native to Europe, Asia and Africa, deadly nightshade is also known as belladonna or Atropa belladonna. The plant was historically used to make poisonous arrows.

1. Pansy
   Star of Bethlehem
2. Snapdragon
   Elephant ear

The elephant ear can be found in southeastern Asia and India. It is a small plant with large leaves. The plant is scientifically known as colocasia.

1. Daffodil
   Statice
2. Poinsettia
   Marigold

The daffodil is a small flowering plant that produces bright yellow flowers. It is scientifically known as the narcissus. The plant is poisonous as a result of the toxic substance lycorine, which is found in all parts of the plant.

1. Hydrangea
   Jasmine
2. Lantana
   Tea rose

Lantana is a perennial flowering plant endemic to the tropical regions of Africa and the Americas. The plant produces small, colorful flowers. The entire plant contains triterpenoids, a type of toxin.

1. Sunflower
   Amaryllis
2. Hemlock
   Tulip

A native to Europe and North Africa, hemlock is a poisonous herbaceous flowering plant. Its scientific name is Conium maculatum, and it's also known as poison hemlock.

1. Begonia
   Oriental lily
2. Hydrangea
   Zinnia

The hydrangea is a small shrub with flowers that grow in small clusters of pink, blue and purple. To feel the effects of hydrangea poisoning, very large quantities of the shrub have to be ingested.

1. Tuberose
   Autumn crocus
2. Waxflower
   Aster

The autumn crocus, which blooms in the fall, has a strong resemblance to the crocus plant. The flower is also known as naked ladies or meadow saffron.

1. Star of Bethlehem
   Pansy
2. Violet
   White snakeroot

A native plant to North America, white snakeroot is a poisonous perennial herb also known as richweed or white sanicle. The plant contains the toxin tremetol.

1. Gardenia
   Iris
2. Hydrangea
   Birthwort

The birthwort, also known as the dutchman's pipe, is a species of climbing plants. The plant produces pipe-shaped flowers that were formerly used for abortion.

1. Statice
   Tulip
2. Snapdragon
   May apple

The may apple, or podophyllum as it is scientifically known, is a perennial plant found in the United States and Canada. The plant's fruit is poisonous when green and unripe.

1. Poinsettia
   Tea rose
2. Black locust
   Zinnia

The black locust is native to the southern United States. A deciduous hardwood, all parts of the black locust plant are toxic to humans and animals.

1. Orchid
   Dracula's flower
2. Amaryllis
   Marigold

The Dracula flower has a unique appearance. The flower is blood red and has a black pistil that sticks out like a tongue. The plant is poisonous and can cause a reaction if eaten ortouched.

1. Manchineel
   Waxflower
2. Tuberose
   Aster

The manchineel is a flowering tree that grows up to forty feet in height. It has yellow-green leaves and bears a small apple-like fruit. The tree contains the toxin phorbol as well as other unidentified skin-irritants.

1. Begonia
   Violet
2. Sunflower
   Jimson weed

A member of the nightshade family, jimson weed (or devils snare) is thought to have originated in Mexico. The plant contains atropine, scopolamine and hyoscyamine. It is used for medical and recreational purposes.

1. Jasmine
   Dumbcane
2. Oriental lily
   Lilac

The dumbcane is a tropical flowering plant native to Mexico and the West Indies. Despite being poisonous, the plant is commonly cultivated as an ornamental house plant.

1. Iris
   Myoporum
2. Star of Bethlehem
   Pansy

A member of the figwort family, the myoporum is one of thirty species of flowering plants of the myoporum genus. Myoporum is a small shrub that produces small white flowers.

1. Zinnia
   Golden shower tree
2. Statice
   Snapdragon

Scientifically known as Cassia fistula, the golden shower tree blooms during late spring. It produces long clusters of yellow flowers that are harmless. The plant's seeds, however, are poisonous.

1. Gympie gympie
   Tea rose
2. Tulip
   Statice

The gympie gympie is a plant commonly found in the rainforests of northeast Australia. The plant is also known as the stinging brush or mulberry leave stinger. The plant is covered in stinging hairs.

1. Violet
   Scotch broom
2. Amaryllis
   Waxflower

The scotch broom is native to Europe. It is a perennial shrub that produces several small yellow flowers.

1. Marigold
   Begonia
2. Rosary pea
   Aster

The rosary pea is also known as the jequirity bean. It is a slender climbing plant whose seeds are bright red and black. It contains the toxin abrin.

1. Star of Bethlehem
   Sunflower
2. Tuberose
   Chinaberry

The chinaberry is a species of deciduous plant also known as the Pride of India, Persian lilac and bead tree. The fruit produced by this tree is harmless. Its seed, however, is poisonous.

1. Lilac
   Orchid
2. Statice
   Death camas

A native of western North America, the death camas is scientifically known as Toxicoscordion venenosum. It is a species of flowering plant that contains the toxin zygacine and other alkaloids.

1. Pansy
   Snapdragon
2. Tea rose
   Strychnine tree

The strychnine tree is a medium-sized tree that grows in open habitats. Also known as the poison nut, the strychnine tree's seeds contain the alkaloids strychnine and brucine.

1. Tulip
   Wisteria
2. Violet
   Waxflower

The wisteria plant belongs to the legume family, Fabaceae. It is a woody climbing vine native to Asia. The plant produces a thick cluster of small purple flowers.

1. Begonia
   Aster
2. Lily
   Amaryllis

Lilies, or lilium, are flowering plants that grow from bulbs. They produce very large flowers that are known to be poisonous to cats.