If you have landed on this page because you are concerned about a child or pet who has eaten a plant, seek emergency medical help.



In the U.S., you can call Poison Control at 1-800-222-1222 (for children), the ASPCA at 1-888-426-4435 (for pets; $60 consultation fee applies), or the Pet Poison Helpline at 1-800-213-6680 (pets; $35 fee applies) .

19000

Lantana camara 'Rose Glow Improved.' Like all Lantana , it is toxic.



I cannot guarantee that the information which follows is accurate,

Differing species will react differently to the same plant.

Even a normally safe species has the potential to be harmful if it has recently been treated with a pesticide

I did not find evidence that this kind of poisoning has ever actually happened, at least not in humans

Agave spp. are, of course, potentially dangerous due to their spines, even if they weren't also somewhat toxic and indigestible.

Agave victoriae-reginae , I think. Since writing that profile, I've become less certain about the ID.spp. are, of course, potentially dangerous due to their spines, even if they weren't also somewhat toxic and indigestible.

Plants that are not actually poisonous may still be dangerous if ingested due to spines, thorns, etc.

Plants which are not actually poisonous may, on rare occasion, cause potentially life-threatening allergic reactions

Ficus benjamina 'Midnight.' Ficus spp. cause allergic reactions in a lot of people, though these are rarely if ever life-threatening. I personally mostly just get itchy.

spp. cause allergic reactions in a lot of people, though these are rarely if ever life-threatening. I personally mostly just get itchy.

I've declined to provide photos

is

There will be extraneous information.

reference to two books

Handbook

Toxicity

Epipremnum aureum . One of a gazillion plants that contain microscopic needles of calcium oxalate, so that if you try to bite them, they stab you back, causing pain and swelling and so forth. Dangerous-ish, insofar as it hurts a lot but usually nobody dies.



Please do try to keep this all in perspective.

or

house

Tradescantia zebrina

. Mild skin irritant for a few people. Generally considered safe.

Crazy super dangerous

Dangerous

Potentially dangerous

Unpleasant

Safe

Unknown/could not determine

Photo credits: all are my own.



Part 1 of a seven-part-and-two-appendix series. ( Part 2 ) ( Part 3 ) ( Part 4 ) ( Part 5 ) ( Part 6 ) ( Part 7 ) ( Appendix 1 ) ( Appendix 2 - Index And it begins.As I explained a couple weeks ago, this was originally planned to be a single, albeit very long, post, and then when I realized that it was on-track to be roughly the size of a smallish novel, I had to scrap that plan and come up with a different way of presenting the information. So I have divided the houseplant-toxicity list into seven posts (plus two appendices), which will go up over the course of this week. I'm not entirely happy about dividing it up, but nobody's going to read a24000 word post all in one sitting.So this post is for the introduction and disclaimers. Let's do the disclaimers first:1)though I have done the best I could, and I'm fairly certain about most of it. When possible, I have referred to books which are specifically about plant toxicity and have beaucoup scientific references to back up what's being said. For other plants, I've used on-line lists (when a consensus existed) or used guilt-by-association (assuming that plants in the same family, and especially in the same genus, share similar levels of toxicity).2)What is toxic to parrots will not necessarily be toxic to turtles, or cats, or babies. For the most part, my references are interested in humans, not pets, so my list is also primarily focused on humans. Some humane societies, pet enthusiast websites, etc., have their own lists, all of which I find problematic in some way or another (or else I wouldn't have felt compelled to come up with my own), but if you're interested in safety for a specific organism, you should probably also consult a list particular to that organism, however questionable some of the information in it might be.When a normally-safe plant is known to be exceptionally harmful to a particular species of interest, I have tried to note this in the text.3), particularly systemic pesticides (which are by design taken up into the tissues of the plant).: the amounts involved would not normally be enough to matter.But it's not impossible.4)and should still not be eaten. (It does sometimes happen that a thorn or sharp projection can slice or perforate esophagus or intestines or whatever on the way through the system of an animal or child. It's rare, and in any case you should already know that there are thorns or whatever and consider the plant dangerous enough to keep out of reach -- you knew about people poking their eyes out, if not about the intestine thing -- but even so I figure I should say it explicitly.) I have taken this into account when deciding which list to place certain thorny plants in.5)in susceptible individuals. Allergic reactions are hard to predict, vary in intensity, may develop over time, can happen in response to pretty much any plant, and happen more often with plants that are dangerous for other reasons anyway, so I haven't made a point of taking this into account.6) In the interests of not making the post any longer than it absolutely had to be,of all of the plants. I've included a few pictures throughout the posts, for decorative / illustrative purposes, and if the plant was the subject of a PATSP profile, I linked to the profile, where there will be other pictures. Googling a plant name will normally turn up a picture anyway, so do that if there's a question.7) I have chosen very deliberately to include a lot of information here, because I feel like I'm having to serve a lot of masters at once (dog owners, parents, herp enthusiasts, recreational drug users, recreational drug users with snakes and children but not dogs, etc.) and I figure it's better to include stuff that may not be relevant to you than it would be to leave something out that. So this is not going to be a quick and clear reference to everything you want to know.I would have given you only the information you wanted to know if I knew in advance what information that was.8) I make frequentNelson, Lewis S., Richard D. Shih, and Michael J. Balick. Handbook of Poisonous and Injurious Plants, 2nd ed. , Springer Science + Business Media, New York, NY, 2007.Spoerke, David G., Jr., and Susan Smolinske. Toxicity of Houseplants , CRC Press, Inc., Boca Raton, FL, 1990.These are often abbreviated toand, respectively, in the text. Just in case you wanted to know where this is all coming from.9)Most of the time, ingestion of a houseplant is not going to result in serious problems. Dangerous plants absolutely do exist, but it's actually very rare that anyone dies, or even has any serious long-term effects. According to one site , in the U.S. in the year 2000, there were six deaths due to "other and unspecified venomous animal or plant" (i.e., either the animal wasn't identified, it was an animal other than snake, lizard, spider, hornet, wasp, or bee,it was a plant), which even if all six were plants, I'd be surprised if all six wereplants. By contrast, hornets/wasps/bees killed 82 people in that year, and suicide killed 32,637. So not only are you probably safer indoor gardening than outdoor gardening, you're (statistically) ata few hundred times safer alone in a room with your houseplant than you are alone in a room with yourself.So anyway. I'm very much in favor of people knowing which plants they have and how dangerous they are. I approve of people taking some basic precautions to keep plants out of the reach of kids and pets. I think there are situations where you should wear goggles (and maybe long sleeves) if you're pruning or taking cuttings to propagate. I think keeping kids and pets away from plants, and making sure they're not top-heavy (the plants, not the kids and pets) and won't tip over on the kids, is a good thing. I also think there are situations where it's handy to know what's what, just so you can make an educated choice and buy safer plant B instead of the more dangerous plant A. However. I do not approve of some of the sites I came across in the course of the research here, which seemed to be less about useful information than trying to scare people: I don't think ZOMG YR PLANTZ WILL KILL U W/ POIZEN!!!1!!!!1!!!! is a realistic or useful message, even though some of them sure enoughIf readers have direct personal experience about any plant, whether on or off of this list (or if anyone outside the U.S. wants to let me know about their country's version of Poison Control and how to contact them, for the advice at the top of the post), please leave it in the comments. I probably will not have the time to respond individually to each and every comment, but that doesn't mean that your feedback might not prove to be useful to someone else, and eventually I will get around to checking out whatever it is, so please, don't hold back.So here's how the rest of this is going to work. I've divided plants into six categories, according to level of danger. The first five are:, and. The sixth category,, is for plants where I either found no information or conflicting information. If anybody knows for certain one way or the other on those, or if anyone disagrees strongly with the placement of a plant on the following lists, please speak up in the comments and I will adjust the post accordingly (if I think you've made your case suitably well: I'm not going to change the post every ten seconds just on some random person's say-so, however wonderful that random person might be. Scientific references, if available, carry a lot more weight with me than anything else. Just so you know.).Tomorrow it begins. We'll start with the ninjas ("crazy super dangerous").