Looks can be very deceiving when it comes to flowers.

Just like us, plants have been evolving for hundreds of thousands of years and have developed different means to protect themselves – from thorns and spines to deadly chemicals.

In this article, we’ll discuss 10 deadly flowers to watch out for. These flowers look harmless to the naked eye, but they also contain toxins and poisonous substances that can be harmful to both humans and pets.

Our List of Beautiful But Deadly Flowers

1. The Queen of Poisons, Aconitum

aconitum

Other names

Other Names:

Aconite, Monkshood, Wolf's-bane, Leopard's bane, Devil's helmet
Native to

Native:

Mountainous parts of the Northern Hemisphere
Toxicity

Toxicity:

Deadly. It contains aconitine, a potent neurotoxin, mostly in its roots and tubers.

2. The Fragrant Killer, Oleander

oleander

Other names

Other Names:

Nerium, Nerium Oleander
Native to

Native:

Mediterranean region. Grown as ornamental plants worldwide.
Toxicity

Toxicity:

Deadly. All its parts contain the cardiac glycosides oleandrin and oleandrigenin.

3. The Innocent Killer, Lily of the Valley

lily of the valley

Other names

Other Names:

Convallaria majalis, May bells, Our Lady's tears, and Mary's tears
Native to

Native:

Asia and Europe
Toxicity

Toxicity:

Deadly. All parts are highly poisonous and contain saponins and Aze, a poisonous animo acid.

4. The Angel’s Trumpet, Brugmansia

angel's trumpet tree

Other names

Other Names:

Brugmansia ‘Feingold’
Native to

Native:

Tropical parts of South America, Andes, Venezuela, Chile, south-eastern Brazil. Grown as ornamental plants worldwide.
Toxicity

Toxicity:

Deadly. All parts are highly poisonous and contain tropane alkaloids, including hyoscine (scopolamine), hyoscyamine, norhyoscine.

5. The Mind-Altering Honey, Azaleas

azaleas

Other names

Other Names:

Rhododendron
Native to

Native:

Asia, Europe, and North America. Grown as ornamental plants worldwide.
Toxicity

Toxicity:

Deadly. It contains andromedotoxins in its leaves and nectar. Its nectar can be fed to bees and used to create lethal honey, known as ‘mad honey’.

6. The Lazarus Bell, Checkered Lily

checkered lily

 

Other names

Other Names:

Snake's head, Chess flower, Frog-cup, Leper lily, Drooping tulip, Fritillary
Native to

Native:

Europe and western Asia
Toxicity

Toxicity:

Deadly. Its bulbs contain poisonous alkaloids.

7. The Deadly Nightshade, Belladonna

belladonna

Other names

Other Names:

Atropa Belladonna
Native to

Native:

Europe, North Africa, and Western Asia
Toxicity

Toxicity:

Deadly. One of the most toxic plants. The entire plant contains tropane alkaloids.

8. The Twining Vine, Jessamine

jessamine

Other names

Other Names:

Gelsemium sempervirens, Yellow Jessamine, Carolina jasmine, Evening trumpet flower, Gelsemium, and Woodbine.
Native to

Native:

Subtropical and tropical America and southeastern and south-central United States
Toxicity

Toxicity:

All its parts contain the toxic alkaloids gelsemine and gelseminine and its sap can cause skin irritation.

9. The Philosopher’s Bane, Hemlock

hemlock flowers

Other names

Other Names:

Conium maculatum, Poison hemlock
Native to

Native:

Europe and North Africa
Toxicity

Toxicity:

Deadly. This is the plant that killed Socrates. It contains conium and multiple toxic alkaloids.

10. The Star of Bethlehem, Ornithogalum

Ornithogalum

Other names

Other Names:

Ornithogalum umbellatum
Native to

Native:

Europe and Southern Africa
Toxicity

Toxicity:

Some of the plants from this genus are toxic and contain alkaloids and cardenolides in their bulbs.

Conclusion

That was our list of the 10 most beautiful but deadly flowers.

If you’d like us to add one or more dangerous and poisonous plants to the list, let us know in the comments section below!

Until then, make sure to be very careful around these plants, as they are dangerous for both humans and pets.

About the Author - Denis Sgarbura

Hello. I’m Denis. My passion for growing plants started when I was around 10 or 11 years old. My grandpa loved to take care of roses. He had a breathtaking rose garden. I wanted one badly. So, I started my own. I was stoked when my roses showed signs of growth. It became a competition: my garden vs. his garden. He won every time, but I never gave up and did my best to make it extraordinary. I read everything there was to know about roses and how to grow them.

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