Editing Acer rubrum (section)

=== Toxicity ===
The leaves of red maple, especially when dead or wilted, are extremely [[List of plants poisonous to equines|toxic to horses]]. The toxin is unknown, but believed to be an [[oxidant]] because it damages [[red blood cell]]s, causing acute [[hemolysis|oxidative hemolysis]] that inhibits the transport of [[oxygen]]. This not only decreases oxygen delivery to all tissues, but also leads to the production of [[methemoglobin]], which can further damage the kidneys. The ingestion of 700&nbsp;grams (1.5 pounds) of leaves is considered toxic and 1.4 kilograms (3 pounds) is lethal. Symptoms occur within one or two days after ingestion and can include depression, lethargy, increased rate and depth of breathing, increased heart rate, [[jaundice]], dark brown urine, [[horse colic|colic]], [[laminitis]], coma, and death. Treatment is limited and can include the use of [[methylene blue]] or mineral oil and [[activated carbon]] in order to stop further absorption of the toxin into the stomach, as well as [[blood transfusion]]s, fluid support, [[diuretic]]s, and anti-oxidants such as [[Vitamin C]]. About 50% to 75% of affected horses die or are euthanized as a result.<ref name="Purdue">{{cite web | last =Goetz | first =R. J. |   title =Red Maple Toxicity | work = Indiana Plants Poisonous to Livestock and Pets | publisher = Purdue University | url =http://vet.purdue.edu/depts/addl/toxic/plant50.htm |   access-date =9 May 2007 |archive-url = https://web.archive.org/web/20070505101113/http://vet.purdue.edu/depts/addl/toxic/plant50.htm |archive-date = May 5, 2007}}</ref>