1. Angel’s Trumpet

These flowers look angelic with their pink and yellow ombre hues. You’ll not think about their beauty though when you experience hallucinations, migraines and diarrhea. Not to mention those temporary insanities and unequal pupil sizes will make you think they’re not heavenly at all.

2. Bleeding Heart

Just by looking at it, you cannot help  but touch these pink heart-shaped blooms. With its drooping tips they are likened to dripping blood. But be cautious! They are not just lovely; they are also harmful to the skin.

3. Rhododendron

Pollen and nectars are the most lethal part of Rhododendron. Bees can mistakenly produce honey that is spiked with poison from these blossoms. Hours after ingestion will lead to illness and others may die from its toxicity.  

4. Nerium oleander

Some of the world’s most dangerous plants come in unsuspecting beauties of flowers. Nerium oleander’s most lethal part can be found in its sap. Also known as oleander, it contains harmful toxins like oleandrin and nervine that are found in the sap. One leaf ingested can be deadly for infants. You better admire these blooms from afar.

5. Calla Lily

Is Calla Lily familiar to you? You may even have one in your backyard or perhaps in one of your centrepieces. Be careful though, as these delicate white beauties are a source of skin irritation upon contact. Though not a true lily, like other lilies, it is poisonous. Skin irritation and a rash can occur upon contact.

6. Milkweeds

Milkweed saps are ideal for hunting by lacing them on the arrows as what many native Africans practice.

But, you will be amazed by the surprising power of Mother Nature. Although considered to be poisonous, this is a natural antidote for poison ivy intoxication.

7. Henbane

Even in smaller doses, Henbane as mysterious as it looks, can bring down humans and some animals. Some visible effects of poisoning are vomiting, decreased and increased pulse rates, visual hallucinations and restlessness.

8. Aconitum

This harmless looking blossom puts the saying “don’t judge a book by its cover” to shame. As innocent and magnificent as it looks this plant is known as one of the hunting poisons-- it can kill the biggest creatures of this world like  whales.

It comes as no surprise that it is called “Queen of All Poisons.” Getting exposed to these flowers will cause heart failure, a decrease in blood pressure and slow pulse among  others.

9. Adenium

Another familiar bloom, perhaps you’ve seen Adenium in home gardens and backyards?

This native Sub-Saharan flower is known as ‘desert rose', a common house plant. If you have this at home, be careful with its sap as it is known to be poisonous. In small doses, it can lead to nausea, but the larger dosage is a catalyst for a heart attack.  It is no wonder that Africans often use the sap to lace poison on their arrows for productive hunting.

10. Opium

Yes, you guessed it right. This is the very opium that is one of the oldest addictive drugs in the world. Like other dangerous drugs, it also comes from plants or herbs. It is only the opium poppy or the papaver somniferum which is used to concoct the drug. Although if constantly used, it may result in tolerance (addiction), opiums remain to be fatal to the nervous system.

11.Naked Lady

The naked lady is the epitome of the adage ‘pretty but deadly’. The beautiful pink glow of the flowers and its fragrant scent is enough to lure the curious ones. The flowers, called Amaryllis belladonna, contain poisons that lead to cardiovascular collapse.

12. Moonflowers

As its name suggests, moonflowers are nocturnal plants blooming at night until the first ray of sunshine. With its characteristic and sweet-smelling scent, these beauties are at par with roses as among the romantic blossoms. Although, be warned! You cannot just put these in your bedroom patio because they can be harmful to you.

13. Bloodroot

Also, known as sweet slumber, bloodroot is nothing near as sweet because the toxic levels can be likened to that of opium. Contact and exposure to these perennials will cause skin scabs and drowsiness that may escalate to coma and even death.

14. Cerbera Odollum

Also called  the ‘suicide tree’, this flowering tree is common in India and some parts of Asia. They produce an alkaloid toxin, which causes heart paralysis. A study conducted between the late 1980s to late 1990s shows that one in 10 plant poisonings is caused by these plants, in Kerala, India alone.

15. Autumn Crocus

A medical breakthrough is in the works with this one as it is under research and development for curing cancer. But, don’t bring out your scientist-wannabe side with Autumn Crocus because they have a deadly colchicine substance.

16. Scotch Broom/Cytisus scoparius

Wouldn’t a bed of Scotch Broom give you the calm that only nature can bring?

Hold it right there!

In the Britain and Ireland regions, these perennials are native plants that have the ability to slow down the heart and nervous system. So, approach with caution or not at all.

17. Daphne

Headaches, convulsions and delirium, are a few signs that you may have been poisoned with Daphne. The innocent white blossoms are often cultivated for its fragrance. Like some dangerous flowers, all of its parts are harmful, but the sap and berries are the most lethal.  

18. Delphinium or Larkspur

Larvae of the Dot Moth and Small Angle Shades snack on these flowers. But, when ingested by a human, the majority of its parts have alkaloid delphinine toxins that will cause vomiting and bring death by disrupting the cardiac and neural systems.

19. Digitalis

Digitalis is also called as Dead Man’s Bells and Witches’ Gloves. Its tube-shaped flowers have deadly toxins affecting major systems  of the body. Despite its lively pink tinge, it destructs the brain, the heart and one’s vision whenever eaten or ingested.

20. Yellow jasmine or Gelsemium sempervirens

Note that not all jasmines are poisonous. Other varieties of the flower are edible. That is why twice the caution is needed-- you may use the poisonous one, gelsemium sempervirens, with our culinary shenanigans. Even honeybees are not spared from their toxin. For humans, the sap may cause skin irritation and intoxication for the little ones.
Flowers are wonderful creations from above. Their lethal character cannot taper off their delicateness and breathtaking charm. Wishing to bring some blooms into your home? You can simply have an online flower delivery. Coming from New Zealand? You don’t have to go to the wilderness, just grab them from zFlowers.com.

21. Duranta erecta

The vivid violet colours make it a fascinating ornamental plant in homes commonly found in Asia and the Pacific region and Africa. This is very potent to kids and pets like dogs and cats. Surprisingly, songbirds cannot be infected with their lethal substance making us wonder why.

22. Ragwort

The bright and sunny flowers cannot mask the bitter taste and pungent scent of these flowers. Humans rarely get in contact with Ragworts because of their smell, but these are fatal to livestock and more dangerous for people with allergies. So don’t stay too close and watch where you’re going!

23. Grevillea

The exotic-looking Grevillea resembles a spider’s leg, which is why it is also named as the Spider Flower and some call it Toothbrush. Animals often avoid sipping nectar from these blossoms due to its toxic contents.

24. Mountain Laurel

Don’t get deceived by its shy pink blush because mountain laurel can be deadly. These beauties are very attractive to bees, but the bees that come in contact with this flower may produce honey that could cause low blood pressure and even death.

25. Laburnum

Laburnums are a little less dangerous. They  contain less toxin. A large dosage ingested, however, is powerful enough to result in poisoning and gastric illness. And a fair warning, its flowers and other parts of the tree are lethal.  

26. Lily of the Valley

The white bulbous flowers look magical. Straight out of Neverland where Tinkerbell flew  her tiny self. But, behind the enchantment lies the danger of these charming blossoms. The berries and other parts of the perennial are toxic if ingested in large quantity. Common symptoms of poisoning include stomach illness, nausea and cardiac failure.

27. Hemlock Water Dropwort

If you are fond of using herbs in cooking like celery or parsley, make sure you look closely and ensure that they are not Hemlock Water Dropwort. This poisonous wild plant can easily be mistaken for the common cooking herbs. The whole plant and the blossoms are fatal, leading to death in mere hours.

28. Sacred Datura

Maybe Sacred Datura should be officially called  witches’ weeds as their hallucinogenic contents lead to delirium and death. Some say that the flowers are used as an ingredient in making love potions. So be careful in using them with your long time crush-- it may lead to disaster.

29. Veratrum

A part of the lily flower family, these white blooms grow in dense patches of land. Unlike their other flower relatives, most parts of the plant are poisonous including its mesmerising white blooms. If ingested, these perennials may cause cardiac failure and other negative symptoms and then death.