Its five blue, violet or white petals are tube-like. Otherwise, any piece of the plant is one more way to spread. Also how beautiful they are. The flowers are mostly single, rarely in pairs, in the leaf axils. This summer I was myself poisoned by hellebore sap—my fingers turned black, as though badly burned. Thank you most kindly for this article; although I knew about oleander being poisonous, I had no idea about Hellebore and Vinca Major & Minor/periwinkle. My kids are always asking which plants are poisonous. This toxic periwinkle is also famous for its common names, such as: MadagascarÂ periwinkle is regarded as a potentially toxic plant depending on the level of exposure and ingestion.Â. This periwinkle plant consists of vinca alkaloids which are sometimes used to prepare medicines for people suffering from diabetes and high blood pressure. My neighbor then removed her plant following the incident. Great lens. I would never have known or suspected. Symptoms: Oleander causes intense abdominal pain, vomiting, diarrhoea, drowsiness, dizziness, visual disturbances, rapid pulse, an irregular heartbeat and heart malfunction, often causing death. Humans who ingest big periwinkle in large amounts may experience low blood pressure, which can lead to collapse, according to the Poison Garden. Thanks for the info. Vinca has been used to treat high blood pressure and control excessive bleeding, but overdose results in hypotension (low blood pressure), which can cause collapse. This is new to me even the leaves of rhubarb. These low-lying, herbaceous perennials prefer partial shade or full sun and ample moisture in the soil, especially during hot, dry weather.Â, These plants spread rapidly and provide a dense carpet of shiny green leaves.Â, The beautiful oval or heart-shaped leaves grow up to 2â to 3â inches in length.Â, PeriwinkleÂ plants produce beautiful spring flowers from April to May, which continue to adorn the gardens during the summer.Â, These fragrant, gorgeous flowers rise above the lush leaves and add spring color to the setting.Â. Diana Grant (author) from United Kingdom on March 23, 2014: @junecampbell: Some people say you should never eat any part of a potato that has turned green, but I don't know. @SavioC: I found this interesting since Vinpocetine is an alkaloid found in the leaf of periwinkle. My daughter generally plucks the flowers. However, some of these can be very helpful with drugs. I have cut off the green parts and eaten the rest occasionally without ill effects, but would hesitate to suggest that anyone else should do that, as people probably have different levels of tolerance. Keith Winter from Spain on July 01, 2013: Another great lens Diana. That said, we do grow and use some medicinal herbs (like comfrey and skullcap) that have been used as folk remedies for ages but in modern times have been grouped into some "dangerous to use" lists. English ivy climbs on other plants and objects in its area. But do come and visit and leave your comments, even if you haven't got any lurid stories to tell. Some of them are taller, up to 2 or 3 feet high. In many instances, extreme vigor may not be desirable unless the periwinkle plant needs to cover a large area. Not all varieties out of the 30 species of PeriwinkleÂ plants are poisonous.Â, While VincaÂ major and minor rarely show mild toxicity, CatharanthusÂ rosea is a highly poisonous variety.Â. The whole plant is poisonous, and even water that the cut plants have stood in is poisonous. In the past, it was sometimes used to cause vomiting after poisoning but this is now known to be harmful. Diana Grant (author) from United Kingdom on April 30, 2010: @norma-holt: Thanks so much for that, Norma. Home > Poisonous plants > Herb > Periwinkle (pink or white) (Catharanthus roseus) Periwinkle (pink or white) (Catharanthus roseus) Small garden perennial growing up to 100cm. Periwinkle poisoning in dogs occurs when dogs ingest all or part of the Madagascar periwinkle plant. It can take years to completely remove it from your property! Haven't noticed any reaction after transplanting them or moving debris from them in the garden. This flowering plant actually grows only on the island of Madagascar. Typical symptoms include coma, death, depression, diarrhea, hypotension, incoordination, low blood pressure, seizures, tremors, and vomiting. I did not know that. Oleander (Nerium oleander) is one of the most dangerous poisonous plants. Check the chart below to learn the differences between these common invasive ground covers. I had no idea! I looked up the Royal Horticultural Society website, and I am sure that if this had been the case, they would have mentioned it. My family has grown them for years. They're always purple? Periwinkle plants (Vinca spp. Plants are shade tolerant and once established, are highly competitive. Barbara Walton from France on July 02, 2013: Yet more lovely garden plants that turn out to be deadly! My dad's wife is making him tea with white periwinkle flowers, he has an enlarged prostate and could not urinate and ended up in the ER with electrolyte inbalance with his legs swollen. :). Very well put together lens, jam packed with useful information. Hellebores are useful plants in the garden, because they grow well in shade or half-sun, and have ornate large green palmate leaves which fill up empty spaces in winter when other plants have died back. Hellebores are mostly creamy white tinged with green, sometimes with mauve or pink colours. It's now one week later and my finger and thumb tips on both hands are still numb. I bet learning the hard way was no fun for you! So I tried looking up poisonous garden plants to dogs and horses and of course they list everything basically because it can make them sick but I wanted to know what were deadly to what, which part, and how, not a lot of luck on that straightforward information. Diana Grant (author) from United Kingdom on August 22, 2012: @anonymous: No, that's the trouble - there are the obvious names that everyone knows, like deadly nightshade, but so many plants can cause problems of one kind or another. I suffer from High BP. a must share page for sure, thank you, Wow, forewarned is forearmed - thanks for the information. It is so scary as i got to know about it. But vines … She enjoys photographing & painting plants too. The flowers are about 3cm across with a slender tube that expands into 5 broad rounded petals. If you didn't know that hellebores, oleander, and periwinkle (Vinca major and Vinca minor) are poisonous, this is a warning to you! Has gone from vibrant to dizzy, confused and walking with a walker???? @burntchestnut: Yes, many people are unaware of which plants are poisonous - I don't recall having been taught about this at school. Your lens provides a valuable source of information on some poisonous plants. Periwinkles are pretty poison. Question: I planted vinca at the base of my orange and lemon trees. These plants are hardy in the U.S. Department of Agriculture (USDA) zones 6 through 10. It never seems to bother them. If you suspect your pet may have ingested a potentially toxic substance, call the APCC at (888) 426-4435 or contact your local veterinarian as soon as possible. Sue Mah from Kuala Lumpur, Malaysia on September 27, 2010: Thanks for the information. All parts of the Periwinkle are poisonous. The odds of surviving increase dramatically If the victim survives the initial 24 hours after ingestion. This stuff should be common knowledge, taught in school or visibly written on the plants for sale. Diana Grant (author) from United Kingdom on August 09, 2012: @anonymous: Yes, and although rhubard stems are edible, the leaves are poisonous, I remember hear about most of these poisonous plants, and now I recall about the green parts of potatoes. You = ), incoordination, tremors, seizures, coma, death off read... Three most common form is bright pink with a walker??????????... Out other plants, the idea being to expel the worms by Vomiting slightly darker centre species... 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