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Poisonous Garden Plants: Daffodils, Lantana and Euphorbia

Diana was a Member of the Royal Horticultural Society. She & her family all love gardening. She enjoys photographing & painting plants too.

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It's surprising how many common garden plants actually have poisonous parts. You won't necessarily die from being poisoned, but it's important to know which plants are in this category and what to do about it if you find strange things happening after contact with them.

I've written a number of articles about poisonous plants. A number of them are listed at the bottom of this page for your information, so that you can learn more about them and also identify them from the photographs.

Poisonous Daffodils

Poisonous Daffodils

Daffodils

Daffodils, narcissi and jonquils (which are all members of the daffodil family) are mildly toxic if the bulbs are eaten in large quantities—some people confuse them for onions.

Poisonous Parts

All parts are poisonous, but especially the bulbs. Daffodils contain poisonous alkaloids called narcitine and narcicysteine.

Symptoms

Abdominal pains, cramps, vomiting, nausea, lightheadedness, shivering, and diarrhea.

Treatment

Intravenous hydration and/or drugs to stave off nausea and vomiting if symptoms are severe or the patient is a child.

Poisonous Lantana

Poisonous Lantana

Lantana

If the berries are ingested, lantana is highly toxic and possibly fatal. You might not be tempted, but watch out for children and pets eating them.

Having said that, however, I did in fact eat the ripe berries as a child, with no ill effects whatsoever.

Poisonous Parts

Green, unripened berries and leaves.

Symptoms

Vomiting, diarrhea, dilated pupils, trouble breathing and the leaves may be a skin irritant. As a skin irritant, lantana causes only mild and/or short-term irritation.

My Own Experience of Lantana (Cherry Pie)

When I was a child, we lived in Africa. We had a big garden, divided up by a long and tall cherry pie hedge. The flowers were mauve and yellow, followed by green berries which ripened into delicious little black berries. I regularly used to pick and eat them straight from the bush, like you do with regular blackberries. The taste was aromatic, and sweet, a bit like blackberries or blueberries, but with a slightly more pungent smell and flavour. The texture was similar, though the berries were a lot smaller. The smell is in my nostrils as I write this.

I'm not sure that my mother knew, but she certainly didn't stop me. Maybe a gentle admonition, but nothing very meaningful or forceful. Poisonous berries? I don't think so—or maybe I am invincible! I certainly never suffered any ill effects whatsoever. And yet, according to my recent research, I could be dead. Mind you, it was the black sweet berries I was eating, and not the green, unripened ones.

So it seems I am lucky to be alive and writing this article.

Poisonous Euphorbia

Poisonous Euphorbia

Euphorbia (Spurge)

There are more than one hundred species of euphorbia, or spurge. In all of these species, the juice or sap is so acrid that it may corrode and ulcerate the skin after any contact.

Poisonous Properties

All species of euphorbia or spurge contain a more-or-less poisonous, acrid milky juice. Contact with the skin causes extreme irritation, inflammation, ulceration, and in some cases gangrene.

If swallowed, it may be fatal.

The caper spurge (E. lathyrus) contains an acrid, emetic, and highly purgative milky juice, and the fruits have commonly been employed by country folk as a purge.

Symptoms

If ingested (swallowed), spurges have an irritating effect on the mucous membrane, especially at the back of the mouth. Around 45–120 minutes after eating the plant, or even longer, there is painful vomiting, followed by diarrhea and low temperature. If the quantity ingested has been sufficient, there will also be nervous symptoms, vertigo, delirium, muscular tremors, circulatory troubles and abundant sweating.

In addition there may be loss of appetite, colic, tympanites, bloating, fever, palpitation of the heart and loss of consciousness. In a fatal dose, the symptoms of superpurgation and enteritis predominate, but are accompanied by nervous symptoms and circulatory disorders.

Remedy

The advice of a physician should be requested immediately.

The poinsettia is also a member of the euphorbia family and is poisonous.

The poinsettia is also a member of the euphorbia family and is poisonous.

Poinsettia

When I lived in Africa, we had a poinsettia tree in the garden. It was so beautiful. The red "flowers" are actually leaf bracts and not flowers at all—and they may also be orange, cream, pink or pale green. The shrub grows to a height between 2–16 feet and bears large leaves. If grown outside, it does best in a subtropical climate where there is no frost, and it has very specific light and dark requirements before it will produce its brightly coloured bracts.

Poinsettia originates from South America. The Aztecs extracted red dye from it and used it as an herbal medicine similar to aspirin and ibuprofen to reduce fever.

Unlike other members of the spurge family, which may be highly toxic, poinsettia is only mildly toxic. It may be a skin or stomach irritant, sometimes causing diarrhea and vomiting if eaten, or a skin allergy to anyone sensitive to latex. If sap goes into the eye, it may cause temporary blindness.

Read About More Poisonous Plants in This Series

This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.

Please Leave a Message About Your Experiences

Diana Grant (author) from United Kingdom on June 11, 2019:

I always knew about poinsettia because my mother used to warn me as a child when we lived in Africa oh-so-many moons ago. But I was surprised myself to learn about daffodils when doing a bit of research about something else

Rose Jones on June 10, 2019:

Fascinating! I had no idea you had to watch out for poinsettia and daffodils.

Diana Grant (author) from United Kingdom on July 04, 2015:

It's may be poisonous but from what I understand, it's not lethal, so you'll be fine

Thelma Alberts from Germany and Philippines on June 29, 2015:

Oh my! I didn't know lantana is poisonous . I have this flower in my garden. Thanks for the info

Jennifer P Tanabe from Red Hook, NY on October 27, 2014:

Great information. I always forget daffodil bulbs are poisonous - maybe some of the creatures that eat mine every year suffer the consequences! I still love poinsettia plants for the holiday season - my cats never ate them, at least as far as I know.

Diana Grant (author) from United Kingdom on February 10, 2014:

@Expat Mamasita: Oh dear, I have a cat, but fortunately she hasn't eaten the leaves

Expat Mamasita from Thailand on February 09, 2014:

Thank you for the info. I never bought poinsettia plants at Xmas when we had a cat as I was told it was poisonous to them if they ate the leaves.

LaptopLeader on June 10, 2013:

Thanks for the information. :) There seem to be a lot of poisonous plants and flowers that we aren't really aware of.

Diana Grant (author) from United Kingdom on January 16, 2013:

@AlleyCatLane: thanks for that information - I'm afraid I never had anything like that when my children were young

AlleyCatLane on January 16, 2013:

Well I misseed the one in the quiz about making them sick. When my kids were little we kept a bottle of Ipecac on hand in case of accidental poisoning. It would make one vomit about 20 minutes after taking. It was the thing doctors and the poison center recommended if your child ate leaves or berries of suspicious origin.

Kandy O on May 17, 2011:

Very informative lens!

Ellen Mitchell on May 11, 2011:

Excellent information. I love the followup quiz.

AbhinavB LM on May 10, 2011:

An eyeopener article for me... every thing that glitters is not gold!!!

Rockett LM on May 10, 2011:

Great information. I had NO idea that daffodils are poisonous. Nice lens!

Linda Hahn from California on May 10, 2011:

No more flower kissing for me.

jlshernandez on May 10, 2011:

Great lens to share. I have holly berries in my garden and eating 20 of these berries can prove lethal. Lenrolled to Summer Flowers in my Garden and Spring Flowers in my Garden.

hotbrain from Tacoma, WA on May 10, 2011:

Nice lens, I'm glad you didn't get sick from those berries you ate!

WindyWintersHubs from Vancouver Island, BC on May 10, 2011:

I always wondered why the deer avoid Daffodils and never clued in that they may be poisonous. Thanks for your info on these poisonous garden plants.

akumar46 lm on May 10, 2011:

Good advice and very nice lens on poisonous plants.

LisaDH on September 09, 2010:

Good information. But poinsettia, though not edible, is not poisonous. It's a persistent myth, but all the reliable sources do indicate it's a myth.

Barbara Radisavljevic from Templeton, CA on March 28, 2010:

I remember as a child playing with other children in yards where plants with red berried grew. Usually one of the children would say the berries were poison, but we all ate them with no ill effects. i have no idea what they were, since I did not know as much about plants then as I do now. Part of the problem though, is that after a few such experiences, children may just disregard warnings about poisonous plants altogether as a kind of "crying wolf."

norma-holt on March 21, 2010:

I am with you and thanks for bringing awareness to these dangerous plants. I blame oleabder for giving me sinus as a three year old and have been very aware of plants that exude white latex stuff from their links. But I love figs and they also have this. 5* and fave

Norma