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Hungry or thirsty horses are more likely to eat poisonous plants, as are those pastured on overgrazed lands. [5] Animals with mineral deficiencies due to poor diets will sometimes seek out poisonous plants. [6] Poisonous plants are more of a danger to livestock after wildfires, as they often regrow more quickly. [7]
Cascabela thevetia (synonym Thevetia peruviana) is a poisonous plant native throughout Mexico and in Central America, and cultivated widely as an ornamental. It is a relative of Nerium oleander , giving it a common name yellow oleander .
Grazing of the plant by horses can cause nigropallidal encephalomalacia or "chewing disease", a neurological condition. The disease generally follows consumption of 60–200% of the horse's body weight over an extended period of a month or more, or 2.3–2.6 kilograms (5.1–5.7 pounds) of star-thistle per 100 kg (220 lb) body weight per day.
The plant generally gets more toxic with maturity, with the exception of the berries (which have significant toxicity even while green). [171] Pieris japonica: Japanese pieris Ericaceae: The plant is poisonous if consumed by people or animals. [172] Plumeria spp. frangipani Apocynaceae: Contact with the milky latex may irritate eyes and skin ...
In late summer and fall, one plant can produce as many as 100 yellow flower heads in a branching array. Each head has yellow 11–21 ray florets surrounding sometimes as many as 800 yellow disc florets. [7] [8] Leaves are dark green, alternate, and lance-shaped. The Latin specific epithet autumnale is in reference to the plant's autumn ...
Horses do not normally eat fresh ragwort due to its taste. [citation needed] [26] The result, if sufficient quantity is consumed, can be irreversible cirrhosis of the liver of a form identified as megalocytosis where cells are abnormally enlarged. Signs that a horse has been poisoned include yellow mucous membranes, depression, and lack of ...
It has fleshy dark green, heart-shaped leaves and distinctive flowers with bright yellow, glossy petals. [ 4 ] [ 5 ] Native to Europe and Western Asia, it is now introduced in North America, where it is known by the common name fig buttercup and considered an invasive species .
The yellow flowers are in a type of clog shape, containing three asymmetrical petals. These pods rattle when mature and they contain toxic alkaloids. These dehiscent pods are most likely a defense mechanism to assure that animals do not commonly ingest these plants, as doing so is poisonous to a number of them.