Betulaceae

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What are the differences between white birch (Betula platyphylla), Japanese white birch (Betula ermanii), and Japanese white birch (Betula platyphylla)? An explanation of how to distinguish between similar species.

White birch (Betula platyphylla), Japanese white birch (Betula ermanii), and Japanese white birch (Betula platyphylla) all belong to the Betulaceae family and are common deciduous trees in cold regions and high mountains. They share the characteristic of having straight, parallel lateral veins on their leaves and fine serrations, and have been widely used for various purposes by the Japanese and Ainu people...
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What are the differences between Alnus japonica, Alnus sieboldiana, and Alnus sieboldiana? How do they differ from other Alnus species? We'll explain how to distinguish between similar species! Why can they grow in poor soil? Did they rely on wind for both their flowers and fruits?

Alnus japonica, Alnus sieboldiana, and Alnus sieboldiana are all species belonging to the Alnus genus of the Betulaceae family and are endemic to Japan. Because they have symbiotic relationships with both ectomycorrhizal fungi and nitrogen-fixing actinomycetes that can utilize atmospheric nitrogen, they are well-suited to living in poor soil and are used not only in the wild but also for greening purposes...
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