Some of the mentioned species may also contain the toxic glycoside, "Arbutin" also present mainly in the Rose family (Rosaceae). [chm.bris.ac.uk]

[…] weak; they suffered from the cold, and one dried(sic) from pneumonia; they also developed a mild condition of rickets, but did not exhibit symptoms of poisoning by the toxic principle of the laurel and rhododendron. some evidence of rickets was also present [accessdata.fda.gov]

A dwarf cultivar of the species, Kalmia latifolia "Elf" is in flower at present. The petite flower buds set weeks before opening and are just as ornamental as the flowers themselves. [odt.co.nz]

They may be present in collections from Frightful Cave in the Cuatrocienegas Basin of Coahuila, Mexico (Adovasio and Fry 1976; Butler 1948; Campbell 1957; Merrill 1977; Taylor 1988). [texasbeyondhistory.net]

The dose is the amount or quantity of chemical present. [articles.extension.org]

• Nausea

  Nausea Bilious attacks, with nausea, vertigo, and headache Vomiting NAUSEA; vomiting more ... GENITALS ETC Menses Female; Menses too early, or suppressed, with pain in limbs and back and inside of thighs Leucorrhoea follows menses. more ... [abchomeopathy.com]

  However, consumption of enough foilage (especially the leaves), berries of flowers can give symptoms of vomiting and stomach upset, very reduced blood pressure and nausea six hours afterwards. [chm.bris.ac.uk]

  It can cause headaches, nausea, heart palpitations, paralysis and even death when taken internally. The slow growing Mountain Laurel is difficult to transplant. In the wild they often colonize by their spreading root system. [mycherokeegarden.com]

  Symptoms include dizziness, weakness, excessive perspiration, nausea, and vomiting. Less commonly, low blood pressure, shock, heart rhythm irregularities, and convulsions may occur, with rare cases resulting in death. [wildflower.org]

• Vomiting

  However, consumption of enough foilage (especially the leaves), berries of flowers can give symptoms of vomiting and stomach upset, very reduced blood pressure and nausea six hours afterwards. [chm.bris.ac.uk]

  Rhododendron ponticum, which was described by Xenophon in the anabasis during the expedition of Cyrus in 401BC near Trebizond (today's Trabzon): The number of bee hives was extraordinary, and all of the soldiers that ate of the honey combs lost their senses, vomited [jamanetwork.com]

  Nausea Bilious attacks, with nausea, vertigo, and headache Vomiting NAUSEA; vomiting more ... GENITALS ETC Menses Female; Menses too early, or suppressed, with pain in limbs and back and inside of thighs Leucorrhoea follows menses. more ... [abchomeopathy.com]

  The nectar can induce vomiting, stomach pains and a runny nose. It is often enough to handle the flowers or leaves to receive a mild dose of ill effects. Whenever you handle mountain laurel you should be very careful about washing your hands. [terrain.net.nz]

  Symptoms include dizziness, weakness, excessive perspiration, nausea, and vomiting. Less commonly, low blood pressure, shock, heart rhythm irregularities, and convulsions may occur, with rare cases resulting in death. [wildflower.org]

• Abdominal Pain

  pain, headache, tingling of skin, lack of coordination, convulsions, paralysis Toxic Principle: Andromedotoxin, a resinoid; arbutin, a glycoside Severity: HIGHLY TOXIC, MAY BE FATAL IF EATEN! [plants.ces.ncsu.edu]

• Diarrhea

  Initial symptoms may include sneezing, diaphoresis, chills, weakness, perioral and limb numbness, and paresthesias, which are followed by vomiting, diarrhea, bradycardia with first-degree heart block or junctional bradycardia, dysrhythmias (including [accessmedicine.mhmedical.com]

• Slow Pulse

  Nausea and slow pulse frequently accompanying. Has also a prominent action on the heart. In small doses, it accelerates the heart’s action; in larger it moderates it greatly. [abchomeopathy.com]

  Excess doses cause vertigo, headache, loss of sight, salivation, thirst, nausea, palpitations, slow pulse and difficulty in breathing. See also the notes above on toxicity. [naturalmedicinalherbs.net]

  pulse, nausea, vomiting, sweating, abdominal pain, headache, tingling of skin, lack of coordination, convulsions, paralysis Toxic Principle: Andromedotoxin, a resinoid; arbutin, a glycoside Severity: HIGHLY TOXIC, MAY BE FATAL IF EATEN! [plants.ces.ncsu.edu]

  Excess doses cause vertigo, headache, loss of sight, salivation, thirst, nausea, palpitations, slow pulse and difficulty in breathing[238]. See also the notes above on toxicity. Antifungal [303]. Other Uses Dye ; Hedge ; Hedge ; Wood. [pfaf.org]

  Excess doses cause vertigo, headache, loss of sight, salivation, thirst, nausea, palpitations, slow pulse and difficulty in breathing [5]. See also the notes above on toxicity. [practicalplants.org]

• Hypotension

  […] include sneezing, diaphoresis, chills, weakness, perioral and limb numbness, and paresthesias, which are followed by vomiting, diarrhea, bradycardia with first-degree heart block or junctional bradycardia, dysrhythmias (including torsade de pointes), hypotension [accessmedicine.mhmedical.com]

• Withdrawn

  Then the grain was withdrawn, and the deer continued on laurel and rhododendron alone for 45 days. [accessdata.fda.gov]

• Headache

  Family stresses, long shopping lines, and unrealistic expectations are enough to trigger tension headaches even in people who are not headache prone 12/04/2018 What's Going on Near You 10,000 Pounds of Peanut Butter What would you do with 10,000 pounds [escambia.ifas.ufl.edu]

  HEAD Head Confusion of brain Headache Pain in front and temporal region from head to nape and to teeth; from cardiac origin. more ... [abchomeopathy.com]

  It can cause headaches, nausea, heart palpitations, paralysis and even death when taken internally. The slow growing Mountain Laurel is difficult to transplant. In the wild they often colonize by their spreading root system. [mycherokeegarden.com]

  Excess doses cause vertigo, headache, loss of sight, salivation, thirst, nausea, palpitations, slow pulse and difficulty in breathing. See also the notes above on toxicity. [naturalmedicinalherbs.net]

  It is hardly ever used in modern herbal medicine, although it is used in homeopathy to cure the symptoms which a large dose can provoke, for example vertigo, nausea, headache, loss of vision, and a number of other ailments. [herbs-treatandtaste.blogspot.com]

• Irritability

  […] deficiency), foxglove, bulb of hyacinth, Indian tobacco, iris root, poinsettia, pokeroot, apricot kernels, apple seeds, green tubers and new sprouts of potatoes, privet, rhubarb leaves, wild tomatoes, skunk cabbage, and jimsonweed; and plants containing irritating [medical-dictionary.thefreedictionary.com]

  It has a splendid effect and will be found useful in overcoming obstinate chronic irritation of the mucous surface. [botanical.com]

  The danger can range from mild irritation to severe illness or death. Even non-poisonous plants can cause choking if someone tries to eat them. Every situation is different; these lists are just a guide. [poison.org]

  The plant’s sap causes skin irritation and severe eye inflammation Oleander - A Poisonous Shrub Fiche plante : Laurier-rose Sanjay Gupta apologizes, admits cannabis is a healing plant that should be legalized 10 Pretty Plants You Didn't Know Were Poisonous [pinterest.es]

• Seizure

  […] perioral and limb numbness, and paresthesias, which are followed by vomiting, diarrhea, bradycardia with first-degree heart block or junctional bradycardia, dysrhythmias (including torsade de pointes), hypotension, CNS and respiratory depression, and seizures [accessmedicine.mhmedical.com]

  Belladonna(Deadly Nightshade) like Sally's in Nightmare before Christmas Oleander richtig schneiden Garden Deco, Tricks, Nifty, Flora, Garage, Terrace, Right Guy, Ornamental Plants, Hydrangea Oleander 2 - Oleander poisoning leads to drowsiness, tremors, seizures [pinterest.es]

Used internally, the leaves have a splendid effect in the treatment of active haemorrhages, diarrhoea and flux. They are also used in the treatment of syphilis, inflammatory fevers, neuralgia, paralytic conditions, tinnitus and angina. [naturalmedicinalherbs.net]

However, the leaves, when crushed into a thick green paste, are extremely effective for the treatment of poison ivy rash. It works far better than Calamine lotion or even Aloe. [redbubble.com]

Used internally, the leaves have a splendid effect in the treatment of active haemorrhages, diarrhoea and flux[4, 21, 61]. [pfaf.org]

Used internally, the leaves have a splendid effect in the treatment of active haemorrhages, diarrhoea and flux [13] [1] [9]. [practicalplants.org]

Chemical control Use fungicides as preventative treatments. Tank-mix and/or alternate products from different groups with different modes of action to prevent the buildup of resistant fungi. According to IR-4 data, Aliette is safe on this crop. [pnwhandbooks.org]

Prevent potted plants in nurseries from falling over allowing foliage to touch the ground. Chemical control Use fungicides as preventative treatments. [pnwhandbooks.org]

Prevention The increased desire of the public for natural (unprocessed) foods, may result in more cases of grayanotoxin poisoning. [food-info.net]

The seedlings are rather sensitive to damping off, so water them with care, keep them well-ventilated and perhaps apply a fungicide such as garlic as a preventative. [naturalmedicinalherbs.net]

The researchers suggested that some flowering plants used chemical defenses to prevent all their pollen being used by the bees to feed their larvae, rather than to pollinate the flower. [missapismellifera.com]

Black walnut trees ( Juglans nigra ) produce a toxic substance (called juglone) that prevents many plants from growing under or near them. [hort.uwex.edu]