Dissertatio botanico-medica sistens rariora Norvegiae is a seminal botanical and medical dissertation presented by Henrik Tonning in 1768 at Uppsala University. Supervised by the esteemed Carl von Linné, this work delves into the unique flora of Norway, highlighting plants of medicinal significance. Tonning’s research was not merely academic; it was a practical exploration aimed at enhancing the understanding of Norway’s indigenous plants and their therapeutic potentials.​

The dissertation is structured to showcase rare Norwegian plant species, detailing their medicinal properties and potential applications. Tonning meticulously cataloged these plants, providing insights into their uses in traditional medicine. This compilation serves as a bridge between the rich herbal traditions of Norway and the emerging scientific approaches to botany and medicine of the time.​

Tonning’s work is a testament to the era’s commitment to preserving and understanding natural resources. By documenting these plants, he contributed to the broader European botanical knowledge, aligning with Linné’s vision of a systematic classification of nature. The dissertation not only reflects the scientific rigor of the period but also underscores the enduring value of traditional knowledge in contemporary medical practices.​

Dissertatio botanico-medica sistens rariora Norvegiae is more than a scholarly document; it is a historical artifact that encapsulates the confluence of tradition and emerging science. It stands as a reminder of the importance of preserving indigenous knowledge and its relevance in the ongoing exploration of medicinal plants.