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... more about "Sieversia"
Joseph R. Rohrer +
Willdenow +
Alaska +  and e Asia. +
For Johann August Carl Sievers, 1762–1795, German-born apothecary who explored eastern Russia in search of medicinal rhubarb +
Ges. Naturf. Freunde Berlin Mag. Neuesten Entdeck. Gesammten Naturk. +
Sieversia +
Rosaceae tribe Colurieae +