Alnus firma

Alnus firma is a member of the Betulaceae family, which includes birches, alders, and hornbeams. This species is part of the Alnus genus, commonly known as alders. It was scientifically described in 1846 by the botanists Siebold and Zuccarini. The species is native to the regions of Japan and Korea, and its presence has been recorded globally, likely due to cultivation or naturalization beyond its native range. The genus Alnus is characterized by its deciduous nature, with species often found in moist or riparian habitats. Alnus firma contributes to the diversity of the Betulaceae family, which is recognized for its ecological importance in various temperate ecosystems.