Giant
Description. Giant hogweed is a poisonous exotic plant. The sap of giant hogweed contains toxins that are activated by light (natural or artificial UV rays). Contact with giant hogweed sap, combined with exposure to light, causes pain and skin lesions similar to burns.
In short - the sap of giant hogweed can cause burns. It contains furocoumarin, which makes skin extremely sensitive to sunlight (phytophotodermatitis).
Touching giant hogweed can cause terrible burns (and even permanent blindness) across the United States. Giant hogweed is so dangerous that you really shouldn't even remove it without the help of a pro. But giant hogweed – or cow parsnip, as it's also called – isn't the only plant out there that you can't even touch.
Giant hogweed is not new to Canada, but every year unsuspecting residents come into contact with the dangerous plant, leading to rashes, burns and — in extreme cases — blindness. The plant is a perennial, which means it comes back every spring.
Giant hogweed (Heracleum mantegazzianum) is a VERY LARGE, invasive plant that can cause painful burns and permanent scarring. Brushing against or breaking the plant releases sap that, combined with sunlight and moisture, can cause a severe burn within 24 to 48 hours.
Coming into contact with the sap of giant hogweed, followed by exposure to sunlight, can produce painful, burning blisters, also known as photo-dermatitis. Hogweed stems contain a large amount of juice that squirts out when stems are broken or cut.
Known colloquially as the gympie gympie (from the Gubbi Gubbi/ Kabi Kabi name for the plant, gimpi gimpi), gympie stinger, and giant stinging tree (D. excelsa), this plant has the dubious honour of being arguably the most painful plant in the world.
Dendrocnide moroides, commonly known in Australia as the stinging tree, stinging bush, or gympie-gympie, is a plant in the nettle family Urticaceae found in rainforest areas of Malesia and Australia. It is notorious for its extremely painful and long-lasting sting.
Known as Gympie-gympie in Australia and salat in Papua New Guinea, contact with this leaf can result in human death, more often extreme pain that can last for months. Stinging hairs deliver a potent neurotoxin when touched.
Aloe Vera is a known miracle worker when it comes to skin ailments. It's been used for centuries, and was called the “plant of immortality” by the ancient Egyptians. Have a sunburn? Rub Aloe Vera gel on inflamed skin for instant soothing.
I learned that the name 'Celosia', actually means 'burning' in Greek. When blooming in large numbers, the blooms actually begin to appear like they are one plant and resemble ornamental grass of fire.
Poison ivy, oak, and sumac all contain an oil called urushiol (yur-oo-shee-aal). If you have an allergic reaction to this oil, you can develop a rash. Because most people are allergic to this oil, just about everyone who comes into contact with it develops a rash.
The most painful
Another common introduced stinger in Australia is the European wasp, Vespula germanica. This wasp's sting doesn't get stuck in our skin, so they can inflict multiple stings when annoyed or provoked.
Stinging nettles (Urtica dioica, Urtica incisa, Urtica urens) are plants that are commonly regarded as weeds in Australia. Stinging nettles are often found in damp areas. They grow about one metre high. Leaves are positioned opposite each other on the stem.
Trigeminal neuralgia
It is one of the most painful conditions known. It causes extreme, sporadic and sudden burning pain or electric shock sensation in the face, including the eyes, lips, scalp, nose, upper jaw, forehead, and lower jaw.
The mimosa pudica — also known as the sleepy plant or touch-me-not — reacts dramatically when touched or shaken.
Given that plants do not have pain receptors, nerves, or a brain, they do not feel pain as we members of the animal kingdom understand it. Uprooting a carrot or trimming a hedge is not a form of botanical torture, and you can bite into that apple without worry.
Burning nettle (Urtica urens) and stinging nettle (Urtica dioica) belong to the family Urticaceae. Both are upright plants, which are well recognized for their stinging hairs. Although both are often called stinging nettle, that common name only applies to Urtica dioica.
Plants may also cause allergic contact dermatitis
Examples of plants in Australia that may cause contact dermatitis are chrysanthemums, primula, tomato plants, grevillea, english ivy and occasionally rhus trees.
This perennial originates in Europe, Western Asia, and North Africa. Though covered in stinging "hairs" that act as needles injecting passersby with formic acid, it loses its sting when dried or cooked. Also known as nettles, common nettles, nettle leaf, and seven minute itch.
Poison Ivy: The Best-Known Itchy Plant
Every part of the plant contains the compound called urushiol, which causes poison ivy's notorious rash — the vine, the roots, the leaves, the flowers, and the berries.
RHODODENDRON: Danger, caution.