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Rhodedendron

Rhodedendron. Morphology. They are characterised by shrubs and small to (rarely) large trees T he leaves are spirally arranged. Leaf size a can range from 1-2cm to over 50cm They can be either evergreen or decidious . The flowers are arranged in many clusters. T oxicology.

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Rhodedendron

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  1. Rhodedendron

  2. Morphology • They are characterised by shrubs and small to (rarely) large trees • The leaves are spirally arranged. • Leaf size a can range from 1-2cm to over 50cm • They can be either evergreen or decidious. • The flowers are arranged in many clusters.

  3. Toxicology • Some species are poisonous to grazing animals • Produce a toxin known as grayanotoxinin their pollen and necter • This disrupts sodium channels affecting the skeletal and cardiac muscles • If eaten via honey it has a slight hallucinogenic and laxative effect. • Is extremely toxic to horses • Some animals die within a few hours of digesting the plant. • Most horses tend to avoid it • As little as 3ml nectar/kg bodyweight or 0.2% of the bodyweight of leaves may be toxic or lethal

  4. Signs and Symptoms • Drooling • Vomitting • Diarrhoea • Inappetince • Abdominal pain • Abnormal heart rate and rhythms • Hypotention • Weakness • Tremours • Depression • Blindness • Seizures • Coma

  5. Treatment • Emesis is used where appropriate • Activated charcoal should be administered repeatedly the first day • Fluid replacement therapy and respiratory support may be necessary. Atropine is recommended for severe bradycardia. Isoproterenol or sodium channel blockers may be used to treat the heart block

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