Another study of 92 cases reported to poison control centers revealed no cases of death, even though up to 20 berries and 5 leaves were eaten. That being said, the average healthy adult can tolerate a few berries. Ingesting the leaves or berries of European mistletoe can cause vomiting, difficulty breathing, shock and even death . The plant is not recommended for patients who have leukemia, brain tumors, or malignant lymphoma or for lactating or pregnant women. In folk medicine, it has been used for its cardiovascular properties. Mistletoes contain glycoprotein lectins that can inhibit protein synthesis, leading to cell death; although these lectins are of the same class as the very toxic ricin found in castor beans (Ricinus communis), the lectins in Phoradendron are much less toxic. ...some Christians believe that mistletoe was originally a tree, but withered into a small bush, because the cross on which Jesus was executed was cut from mistletoe wood? It’s been known to cause blurred vision, nausea, diarrhea, and vomiting. Maximum height – 1 m A liquid extract containing key medicinal components of the mistletoe plant has also been used for decades to treat cancer, mainly in Europe and parts of Asia. Only in nursing infants can poisoning have more severe consequences. Other species of mistletoe will have differing medical properties and may be dangerous. European Mistletoe. There are several types of mistletoe which can be poisonous to pets: Phoradendron serotinum (American variety) and Viscum album (European variety). The leaves and berries of European mistletoe are poisonous. Consumption of a large number of berries is extremely dangerous and warrants a call to Poison Control. Mistletoe is an angiosperm, living as a hemi-parasite on other plants. Mistletoe is used to treat high blood pressure and cancer. The number for Poison Control is 1-800-222-1222. She has taught science courses at the high school, college, and graduate levels. Avoid consuming raw mistletoe of any variety, as it can be poisonous and induce vomiting, seizures, slowed heart rate and even death. Only European mistletoe can be used therapeutically, as American mistletoe is unsafe. The poisonous qualities of mistletoe have not been conclusively proven; only larger quantities are … Berries from this holiday plant contain polysaccharides, alkaloids, and lectins. A study of 1754 American mistletoe exposures revealed none resulted in death, even though 92% of the cases involved children. The Viscum species of mistletoe contain a slightly different cocktail of chemicals, including the poisonous alkaloid tyramine, which produce essentially the same symptoms. European mistletoe ingestion has caused cases of poisonings and sometimes deaths. There are multiple species of mistletoe. Many of us know someone who ate a berry or two as a kid and lived to tell the tale. Although mistletoe can be dangerous, it also has therapeutic uses. With over 1500 varieties of Mistletoe in the world, some are more toxic than others. It appears that American Phoradendron mistletoe is less toxic than the European species Viscum album. But, the European mistletoe is more poisonous than its American counterpart Mistletoe Poisoning is the accidental or intentional intake of the leaves of the plant This plant has paired, oval leaves and yellow-green flowers. In humans, the poisoning symptoms also include hallucinations, which may account for the erratic behavior in other animals as well. The European variety is Viscum album and the common mistletoe in the US is Phoradendron serotinum. It is native to Europe and western and southern Asia.. Viscum album is a hemiparasite on several species of trees, from which it draws water and nutrients. However, American mistletoe isn't as toxic. But the plant also is important to … The plant has been used medicinally in Europe for hundreds of years to treat arthritis, high blood pressure, epilepsy, and infertility. But the other side of this botanical coin is all species of mistletoe are poisonous. The literature on the European variety includes reports of serious poisonings and deaths, usually due to excessive concentrated herbal use such as brewing mistletoe in tea. Mistletoe is poisonous Eating any part of the plant can cause drowsiness, blurred vision, diarrhea, nausea, vomiting, weakness and seizures. The plant so associated with love is actually a hermiparasite that feeds off other plants as well as the sun. It is even used to kill cancer cells and help recovery from chemotherapy treatments. But mistletoe is also capable for growing on its own; like other plants it can produce its own food by photosynthesis. When accidentally ingested by our pets, mistletoe poisoning can result in mild signs of gastrointestinal … Pretty poison. European mistletoe ingestion has caused cases of poisonings and sometimes deaths. ...the substance viscin, extracted from mistletoe sap was used to trap birds, due to its sticky property (birdlime). Class – eudicots (Rosopsida) Some studies indicate mistletoe may be useful in treating cancer, although further evidence is needed. There is only one species of mistletoe in Europe: European or Common Mistletoe (Viscum album). Species of mistletoe are present in both North America and Europe. Mistletoe plants, both American and European, contain toxins that are damaging to the cell structure. Eating one or a few berries is unlikely to cause sickness or death. (The plants aren’t poisonous to chickens, of course.) ...the custom of kissing under mistletoe was brought to Germany by British mercenaries? Most of the risk comes from the effect the proteins in the plan have on the cardiovascular system. ...mistletoe is one of the symbols of Christmas, and tradition states that it brings fortune and blessings to a home? All are hemiparasitic plants that grow on host trees, such as oak and pine. It can grow on deciduous or coniferous trees, dependent on the subspecies. Locally common in the UK, European Mistletoe as it name suggests is the only Mistletoe species native to Great Britain and Europe. Mistletoe IS poisonous, although it is doubtful as to whether it will actually cause death. The toxins responsible can be found in the leaves and berries of the plant. Yes it is, but only in excess. Division – angiosperms (Magnoliophyta) Most adults can eat a few berries without harm, but children and pets are at risk of poisoning. A study of 1754 American mistletoe exposures revealed none resulted in death, even though 92% of the cases involved children. By using ThoughtCo, you accept our, How the Sixth Mass Extinction Affects the U.S. Economy, Ph.D., Biomedical Sciences, University of Tennessee at Knoxville, B.A., Physics and Mathematics, Hastings College. Mistletoe has been used to treat cancer, although there is a lack of quality clinical trials and little evidence of an effect. European mistletoe, like man… The plant grows as a semi-spherical tuft on trees. Distinguishing marks: The pods are tiny, irregular berries, white to yellow in color. ...Celtic druids regarded mistletoe as sacred, believed that it was capable of curing all ailments, and used it as a cure for infertility? While mistletoe is not used in the United States, an injectable form of the plant is available in Europe as an adjuvant cancer therapy. Many of the other mistletoe species live in tropical and subtropical climates in different parts of the world. Type of poison – polypeptides. The European variety has a documented history of being highly poisonous to humans and pets. The leaves and berries contain the highest concentration of dangerous chemicals. This entry only refers to poisoning from the ingestion of plant material from Viscum album and not Phoradendron tomentosum. It can grow on deciduous or coniferous trees, dependent on the subspecies. It is popular at Christmas due to its association with kissing under the mistletoe. Enter Phoradendron serotinum, otherwise known as Eastern Mistletoe — which does grow wild in North America. The irony of this is not lost on us at all. The leaves and berries contain the highest concentration of toxic chemicals. Branches are forked and break easily. Aside from its parasitic nature, every part of the plant is poisonous when ingested, particularly that of the European variant of the plant. Mistletoe Toxic Components Both mistletoe species are toxic to horses. The poisonous qualities of mistletoe have not been conclusively proven; only larger quantities are known to cause diarrhea and stomachaches. Mistletoe, however, is more commonly found growing as a parasitic pla… ThoughtCo uses cookies to provide you with a great user experience. All of them produce toxic compounds. European Mistletoe - Viscum album - image is under CC-BY-SA, from The Royal Botanic Garden Edinburgh, Mistletoe in crown of tree - image is under CC-BY-NC-SA, from Malcolm Storey. However, it's important to remember the species in Europe (Viscum album) is less toxic than the species found in America (Phoradendron serotinum). According to the National Capital Poison Center’s recent studies describing American mistletoe exposures (mainly by young children at Christmas), you’d have to eat a whole lot of berries to … However, American mistletoe isn't as toxic. Do remember that this site is mostly about European Mistletoe, Viscum album, and any medical issues described relate to that species only. It may also decrease side effects of radiation and chemotherapy. There is particular confusion sometimes in North America, where local mistletoe species (especially Phoradendron) may be significantly more poisonous than our European variety. It uses its special root-like organs (haustoria) to steal nutrients, water and minerals from its host. The risk of poisoning is higher for children and particularly for pets. Distribution – Europe, Asia (Viscum album) As a parasitic plant, it grows on the branches or trunk of a tree and actually sends out roots that penetrate into the tree and take up nutrients. As opposed to true parasites, it also uses photosynthesis to create its own organic substances. Viscum album (European mistletoe) should not to be confused with American mistletoe (Phoradendron tomentosum). Further study is needed. Toxic parts: Berries are the most dangerous but all parts are toxic Mistletoe is a group of hemiparasitic plants that live on trees with a worldwide distribution. These berries, and those of other mistletoes, contain toxic compounds poisonous to many animals and to humans. Viscum album is a species of mistletoe in the family Santalaceae, commonly known as European mistletoe, common mistletoe or simply as mistletoe (Old English mistle). The plant originally named mistletoe, Viscum … European mistletoe (Viscum album) as well as American mistletoe (Phoradendron serotinum) are both evergreen parasitic perennials with white or translucent berries, that grow on the trunks and branches of deciduous trees. However, anaphylactic reactions are known, so it's important to watch for indications of a reaction to the plant. ...mistletoe is a hemi-parasitic plant, living on various kinds of trees? Is Mistletoe Poisonous? The European mistletoe (Viscum album), which has oval-shaped leaves and white berries, is the “original” mistletoe plant of European mythology and reverence, and it’s the only mistletoe species throughout most of Europe. In fact, although until recently American mistletoe was widely considered to be as poisonous as the European species, downing a few berries is likely to lead to no more than a stomachache. Because of its vampiric tendencies, … The American mistletoe is less toxic than the European varieties of it. For the most part, mistletoe therapies are used in healthy adults, although there are reports of successful use in pediatric patients. The Viscum species of mistletoe contain a slightly different cocktail of chemicals, including the poisonous alkaloid tyramine, which produce essentially the same symptoms. Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. Injectable mistletoe extract is widely used in Europe but is n… Were they just lucky or is it okay to eat a few berries? Out of the two most common varieties of mistletoe, it’s the European (Viscum album) that is actually a poisonous plant. According to the National Cancer Institute, mistletoe extract has been demonstrated to affect the immune system and kill cancer cells in the laboratory. There are several species of mistletoe. In the USA, the FDA has not approved the use of mistletoe. Mistletoe is especially interesting botanically because it is a partial parasite (a \"hemiparasite\"). The berry, leaf, and stem of European mistletoe are used to make medicine. There are two general types of poisonous mistletoe that are sold for Christmas. The species that is most commonly associated with Christmas is the European mistletoe, or Viscum album. These are the most common, the mistletoe family contains over 900 species. The answer is that the risk of poisoning depends on the type of mistletoe and what part of the plant is eaten. The Phoradendron species contain a toxin called phoratoxin, which can cause blurred vision, nausea, abdominal pain, diarrhea, blood pressure changes, and even death. In the fall and winter, the plant bears clusters of white berries that have a waxy appearance. All parts of the plant are toxic (that’s berries, stem and leaves). Discover surprising insights and little-known facts about politics, literature, science, and the marvels of the natural world. 1 Phoratoxins and ligatoxin A found in mistletoe are small proteins that can act as cardiac depressants, causing hypotension, bradycardia, and decreased … While kissing under the mistletoe is perfectly acceptable, eating the plant or its berries is not a good idea. Isn’t mistletoe poisonous? Jacky Parker Photography/Moment/Getty Images. Overview Information European mistletoe is a plant that grows on several different trees. They have different toxic ingredients but both can do harm. They are common holiday symbols sold frequently during the winter holiday season. Mistletoe Is… Poisonous. Mistletoe is also used in veterinary herbal medicine. Clinical efficacy has not been established. Check your species! In the wild, the two varieties of mistletoe most often hung at Christmas both parasitize deciduous trees. The symptoms are caused by a … Mistletoe toxicity is unusual in cattle. The white berries of mistletoe plants are poisonous to humans but valuable food to many other species. Several species of mistletoe contain poisonous ingredients called phoratoxin and viscotoxin which, if consumed, can cause drowsiness, blurred vision, diarrhea, nausea, vomiting, weakness and even seizures — a bit like eggnog, only worse. The Mistletoe plant contains Phoratoxin and Viscotoxin, which are both poisonous proteins when ingested. A well known parasitic evergreens for its supposed medicinal and perceived magical properties. Is mistletoe really poisonous? ...mistletoe contains the poison lectin, which strengthens the body's immune reaction against cancer and even slows tumor growth? Their parasitic lifestyle has led to some dramatic changes in their metabolism. In one case, a child suffered a seizure, but researchers were unable to definitively link it to mistletoe consumption. The plant is known to be mildly toxic in nature. There is only one species of mistletoe in Europe: European or Common Mistletoe (Viscum album). European mistletoe is missing crucial components of its electron transport chain, leading researchers to conclude that mistletoe steals sugar from its host plants instead of making the energy molecule ATP from scratch. Basic information: It has a significant role in European mythology, legends, and customs. Often used as a symbol of renewal because it stays green all winter, mistletoe is famed for its stolen-kisses power. Mistletoe tea and berries made in tea may be used to treat hypertension at a dose of 10 g/day. Mistletoe isn’t known to kill humans, but it can cause drowsiness, blurred vision, vomiting, and even seizures. There are several species of mistletoe, including Viscum album (European mistletoe) and Viscum album coloratum (Korean […] They are attached to their host tree or shrub by a structure called the haustorium, through which they extract water and nutrients from the host plant. For the purists out there, most of what you can buy in the way of live mistletoe is the European species (Viscum album) which would have been the species favored by those dancing Druids. Alternatively, drinking a tea from the plant can result in sickness and possibly death. Mistletoe is the common name for obligate hemiparasitic plants in the order Santalales. 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