The scientific genus name for alder trees, woody plants commonly found near water that have small catkins and fix nitrogen in the soil.
From Latin alnus, the classical Latin name for alder. This genus name has been stable in scientific nomenclature for centuries, representing continuity between ancient and modern plant classification.
Alder trees are some of nature's most useful plants for environmental restoration—they actually pull nitrogen from the air and enrich poor soil, which is why ecologists plant them to rebuild damaged landscapes.
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