Britannica Illustrated Science Library Plants, Algae And by Inc. Encyclopaedia Britannica

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35 ounce (1 mg) is enough to kill a person. P Poison Ivy is a low vine that grows along the ground and often climbs walls, tree trunks, and bushes. It has bright green leaves that have an oily toxin, which causes light to severe allergic reactions. The symptoms can appear between one and three days after having touched the plant. A Matter of Quantity Poison is a substance that produces illness or tissue lesions or that interrupts natural vital processes when it comes into contact with the human organism.

When the leaf-trap reopens after a few weeks, the wind blows away the parts of the exoskeleton that were not digested. 62 RARE AND USEFUL PLANTS PLANTS, ALGAE, AND FUNGI 63 Hanging from Other Plants SPECIAL SIGNS These plants are recognized for their bulbs, which have the shape of a small rose, and for their triangular leaves, which are densely covered by hairs. The purple lilac color on their petals is also very characteristic. FRUITS Fusiform. 15 inch (4 mm) in diameter. They contain feathery seeds that disperse with the wind.

These mycotoxins can cause hallucinations, convulsions, and very severe damage in the tissues of human organs. Poisonous Mushrooms A Ergot (Claviceps purpurea) is a parasite of rye and produces alkaloid mycotoxins—ergocristine, ergometrine, ergotamine, and ergocryptine. When barley with ergot is processed for use in food, the mycotoxins can be absorbed when eaten. All these toxic substances can act directly on nerve receptors and cause the constriction of blood vessels. 1. 4. 2. ERGOTISM (ST. ANTHONY'S FIRE) Ascospores of sexual origin or asexual conidia develop as parasites in the ovary of the rye flower.

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