Killer Plants

Some Deadly Poisonous Plants in the Earth

Plants are living organisms belonging to the kingdom Plantae. They include familiar organisms such as trees, herbs, bushes, grasses, vines, ferns, mosses, and green algae. The scientific study of plants, known as botany, has identified about 350,000 extant species of plants, defined as seed plants, bryophytes, ferns and fern allies. As of 2004, some 287,655 species had been identified, of which 258,650 are flowering and 18,000 bryophytes (see table below). Green plants, sometimes called Viridiplantae, obtain most of their energy from sunlight via a process called photosynthesis.

Moonseed

Images Source:  Missouri plants and paradisegardentx

A otherworldly name and a plant with often fatal effects. The seeds of this Eastern North American drupe (stone fruit) are extremely toxic to humans, although birds can eat them. Moonseeds first cause paralysis but are fatal in larger doses and/or if treatment is not sought immediately.

Castor Bean

Images via UCC, My Sunshine Garden and remarc

Castor oil – for anyone unlucky enough to have been force spoon-fed this healthy yet disgusting fluid as a child, you may be surprised to learn that an ingredient in the castor bean just happens to be the deadliest plant poison on earth. Literally. Just one tiny castor bean is enough to kill an adult within a few minutes. Castor oil is made safe (but not palatable) with the removable of the lethal compound known as ricin. Amazingly, castor bean plants are grown for decorative purpose all over the place, particularly in California.

Rosary Pea

Image source stellasmagazine

As if a deadly legume weren’t bad enough, the pulses aren’t so benign, either. The rosary pea may sound sweet and downright pious, but it’s actually one of the most dangerous plants on earth. Its seeds contain a particular lectin known as abrin; if chewed and swallowed, death will follow shortly. The seeds are easily identified with their distinctive bright red jacket and single black dot (almost like a reverse Black Widow spider). Abrin, which does its damage by inactivating ribosomes, is one of the most fatal toxins on earth. After the  vomiting, fever, nausea, drooling and G.I. dysfunction but before the bizarre hyperexcitability, edema and fatally convulsive seizures, renal tubular degeneration, bladder and retinal hemorrhage and widespread internal lesions typically develop.

Snakeroot

Images via Stellasmagazine

Snakeroot is most dangerous for livestock such as cattle and sheep. When cows consume the attractive fluffy white blooms and stems of the snakeroot, their milk and bones become saturated with the toxin tremetol and humans who consume these contaminated animal products will develop milk sickness (tremetol poisoning). In fact, milk sickness is what killed Abraham Lincoln’s mother, Nancy Hanks.

Bushman’s poison

Images via plantzafrica

The aptly-named Bushman’s poison has famously been used by the Khoisan of South Africa to poison the tips of their arrows. Though the plant produces pleasantly scented flowers and a tasty plum-like berry, the milky sap can be fatal. The leaves, however, have medicinal properties. Bushman’s poison is also known as the wintersweet.

English Yew

Images via greenlover, c-r-alpacas, bomengids, and Britannica

The English Yew, or taxus baccata (“taxus” meaning toxin), is one of the deadliest trees on the planet. The evergreen has a majestic and lush appearance and is fairly common in forests of Europe. The yew is considered by scientists to be an odd and primitive conifer along with the monkey puzzle tree of Chile and Gingko biloba tree of Asia. The yew has a rather sad history. All parts – save for the flesh of the berries – are extremely poisonous. Because the toxin causes convulsions and paralysis, it was once used as an abortifacient.

Apothecaries would dry and powder the leaves and stems and give desperate women minute amounts in the days before birth control was available. Unfortunately, death would often result. The yew has been quite popular throughout history for a number of medicinal purposes at extremely dilute levels, but it is deemed too dangerous in modern medical practice to be of use. The yew’s primary toxin is taxine, a cardiac depressant. The yew acts rapidly and there is no antidote.

Narcissus

Images via the Guardian and the flower expert

Narcissists are toxic enough when they come in human form, but the plant for which they are named, also called the daffodil, is highly poisonous. Poet’s narcissus is more toxic than daffodil, but in both cases it is the bulbs, not the flower or stems, that cause illness. One famous fatal case in Toulouse in the early 1900s occurred when the bulbs were mistaken for onions and consumed. According to Botanical.com, “Socrates called this plant the ‘Chaplet of the infernal Gods,’ because of its narcotic effects. An extract of the bulbs, when applied to open wounds, has produced staggering, numbness of the whole nervous system and paralysis of the heart.” Yet, there are medicinal properties, and some cultures even believe they can cure baldness and serve as a potent aphrodisiac. (Do not try at home.) 

Strychnine tree

Images via motherherbs, BRAIN and wikipedia

Queen Cleopatra famously forced servants to commit suicide by means of a strychnine tree’s fruit seeds, which contain lethal levels of strychnine and brucine, in order to determine if it would be the best means for her own suicide. Upon seeing their agony (which included painful vomiting, facial contortions and convulsions) she opted for the apparently less horrific choice of the asp. (The asp was actually an ancient term for any number of poisonous snakes, but experts think it was probably the cobra that Cleopatra chose to end her life.) 

Daphne

Images via Bonnie Day and Island Net

This plant, also called the spurge laurel, is a favorite ornamental shrub in Europe. This drupe-producing evergreen with waxy, attractive foliage and gorgeously fragrant blooms is also highly toxic. Consumption of the leaves or red or yellow fruits will first cause nausea and violent vomiting, followed by internal bleeding, coma and death. The daphne plant is rich in the toxin mezerein.

Choke cherry

Images via Why Oh Why and BC

Chokecherry, or wild cherry, is a North American plant that is known for its large sprays of tiny white flowers. The cherries are small and not eaten. The plant’s woody stalks and leaves are full of hydrocyanic acid, which is fatal if consumed. The poison affects the respiratory system, and rapid breathing, choking and asphyxiation result. 

Jimsonweed

Image Source: ToyZone

Location: Jimson weed is usually found in warm climates. While it is not native to Britain, it can now be found growing in the gardens of southern England.

Jimsonweed was originally called Jamestown weed because the soldiers sent to quell "Bacon’s Rebellion" in Jamestown, Virginia, in 1666 ate the berries when food ran out and mass poisoning resulted. Another man was poisoned after he drank an herbal tea brewed from the leaves of this plant.

The funnel-shaped flowers of the jimsonweed plant are white or purple. The entire plant has an unpleasant odor, and the fruit, which appears in autumn, is prickly, ovoid or globular, and contains numerous wrinkled black seeds.

Effects and Symptoms: People who ingest parts of the jimsonweed plant will experience headache, vertigo, extreme thirst, dry burning sensation of skin, dilated pupils, blurred vision, loss of sight, involuntary motion, mania, delirium, drowsiness, weak pulse, convulsions, and coma. These symptoms, if left not treated properly can result in the death of the patient.

Fox Glove

Image Source: ToyZone

Location: Although it is sometimes cultivated in gardens, foxglove is frequently found wild in north central and north-eastern United States, as well as along the Pacific Coast, and in Hawaii.

All parts of the fox glove plant are toxic. Digitalis purpurea is a heteroside. The leaves contain digitalin, digitoxin, and digitonin. Severe poisoning comes about as a result of eating the leaves “”either dried or fresh “” which do not lose their toxicity through cooking.

Effects and Symptoms: Headache, nausea, vomiting, diarrhea, blurred vision, delirium, slow or irregular pulse, distortion of colors, and death. Death is usually caused by ventricular fibrillation, excessively increasing the force of the heart’s contractions which in turn irritates the heart and stimulates the central nervous system.  Sources: whmentors.org, Live Science, How Stuff Works, Wikipedia