The common name alder evolved from the Old English word alor, which in turn is derived from Proto - Germanic root aliso.
The generic name Alnus is the equivalent Latin name (which is also the source for Alamo, the Spanish term for the tree).
Alders are commonly found near streams, rivers, and wetlands. Sometimes where the prevalence of alders is particularly prominent these are called alder carrs. In the Pacific Northwest of North America,
Alder bark contains the anti-inflammatory salicin , which is metabolized into Salicylic acid in the body.
Some Native American cultures use red alder bark (Alnus rubra) to treat poison oak, insect bites, and skin irritations. Blackfeet Indians have traditionally used an infusion made from the bark of red alder to treat lymphatic disorders and tuberculosis.
Recent clinical studies have verified that red alder contains betulin and lupeol, compounds shown to be effective against a variety of tumors.
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