Classic texts: John Hill 1812.
Betula
Betula L.
Engl.: birch.
Deu.: Birke.
Suom.: koivu.
Sven.: björk.
Salicylate herbs.
Henriette's herbal blog: Meadowsweet vs. poplar buds and salicylous tree barks.
Classic texts: Rafinesque 1830.
Botanical keys with images from Jan De Langhe: Betula, birches.