Henrik Viktor Rosendahl (12 December 1855, Filipstad – 11 August 1918, Stockholm, was a Swedish physician, pharmacologist and botanist.
After 1895, he not only continued as a lecturer, but also maintained a private clinic in Stockholm which specialized in sexually transmitted diseases.
As an author, Rosendahl’s works were comprised mostly of textbooks, and botanical essays.
[4]Rosendahl's writings deal with pharmacology, pharmacognosy, and related areas of research, such as Farmakologiska undersökningar rörande Aconitum septentrionale (Pharmacological studies concerning Aconitum septentrionale; 1893, later translated into German), Järnets verkningssätt inom organismen (The mode of action of iron in the organism, 1894), Kopparns fysiologiska betydelse för växt- och djurriket, dess giftverkan och terapeutiska användning (The physiological significance of copper for the plant and animal kingdom, its toxicity and therapeutic use, 1895), Analys af bröd från vikingatiden (Analysis of bread from the Viking Age, 1911), etc.
[1] As a botanist, he focused on cultivation and study of the ferns and wrote about native Swedish species in Bidrag till Sveriges ormbunksflora (Contributions to the Swedish flora, part 1, 1909; part 2, 1913).