These include agapanthus, autumn crocus, clivia, daffodil, hippeastrum, hyacinth, lily of the valley, tulips and some irises. The bright yellow and red seeds are used in bush tucker, but only after the toxins have been leached out. They're poisonous if you eat them fresh from the branch.
Described by Pliny the Elder in Ancient Rome, oleander is a beautiful plant known for its striking flowers. Though commonly grown as a hedge and ornamental, all parts of the oleander plant are deadly and contain lethal cardiac glycosides known as oleandrin and neriine.
The oleander, also known as laurel of flower or trinitaria, is a shrub plant (of Mediterranean origin and therefore, resistant to droughts) with intensely green leaves and whose leaves, flowers, stems, branches and seeds are all highly poisonous, hence it is also known as "the most poisonous plant in the world".
Hogweed. The two species of hogweed, the giant hogweed (Heracleum mantegazzianum) and the common hogweed (H. sphondylium), are native to Europe and have naturalized in parts of the U.S. The leaves and sap of these weedy wildflowers contain chemicals called furocoumarins and should be avoided.
But before we begin, common landscape and flowering plants you should avoid eating include: clematis, hydrangeas, sweet peas, azaleas, daffodils, daphne, lily-of-the-valley, foxgloves, bleeding hearts, rhododendrons, wisteria, oleander, lupines, hyacinths, four-o'clocks, calla lilies, and castor beans.
1. Botulinum toxin. Scientists differ about the relative toxicities of substances, but they seem to agree that botulinum toxin, produced by anaerobic bacteria, is the most toxic substance known. Its LD50 is tiny – at most 1 nanogram per kilogram can kill a human.
Answer: Stick to the seeds when it comes to eating sunflowers. The flowers and leaf and stem hairs contain a mixed bag of chemicals called sesquiterpene lactones that commonly cause bad reactions in humans–both on the skin or if ingested.
Every portion of this plant is packed of toxins, making it the most dangerous plant on the planet. Oleandrin and neriine are two of the most potent. The poison of an oleander is so potent that it can even poison someone who eats honey created by bees that have ingested oleander nectar.
The giant hogweed's toxic sap could give you third-degree burns if you don't get out of the sun and wash it off immediately. Like an anti-sunblock, chemicals in its juices disrupt your skin's ability to filter out harmful UV rays.
The plant may have greenish-white flowers and whitish-yellow berries. Every part of the plant contains an oil that inflames skin and results in painfully itchy blisters and rashes. Inhalation of smoke from burning leaves and vines is extremely hazardous.
You'd probably be shocked to discover that this pretty plant actually has one of the most poisonous flowers in the world. If ingested, it can cause vomiting, diarrhea, seizures, coma or even death.
Well, yes and no. Some flowers and flower petals are poisonous. For example, all parts, including the petals of the flower, of all Delphinium species (such as, Delphinium carolinianum (Carolina larkspur)) are highly toxic and may be fatal if eaten.
The box jellyfish is the world's most venomous animal with four species — Chironex fleckeri, Carukia barnesi, Malo kingi, and Chironex yamaguchii — considered highly venomous. The Chironex fleckeri, also known as the Australian box jellyfish is considered the most venomous animal in the world.
Dendrocnide moroides, commonly known in Australia as the stinging tree, stinging bush, Queensland Stinger or gympie-gympie, is a plant in the nettle family Urticaceae found in rainforest areas of Malaysia and Australia. It is notorious for its extremely painful and long-lasting sting.
