Hoppe, a merchant's son from Vilsen, Hanover, began his career as a pharmacy apprentice in Celle, and subsequently was an assistant pharmacist in Hamburg, Halle, Wolfenbüttel and Regensburg. From 1792 onwards, he studied medicine and natural sciences at the University of Erlangen, and following graduation returned to Regensburg as a physician. Here he taught classes at the Regensburg lyceum. He studied the flora of the Danube region surrounding Regensburg. In June 1798 he first explored the Untersberg massif near Salzburg, and almost each summer until 1843 continued his botanical excursions from Salzburg into the Eastern Alps. With bryologistChristian Friedrich Hornschuch, he published a treatise involving an extended scientific journey to the Adriatic coast and the mountains of Carinthia and Tyrol, called "Tagebuch einer Botanischen Reise nach den Küsten des Adriatischen Meeres und den Gebirgen von Kärnten, Tirol und Salzburg 1799". He explored the region around Heiligenblut and the Grossglockner several times, where he found and described Eriophorum scheuchzeri, Sesleria ovata, Polytrichum sexangulare, Pedicularis asplenifolia, and Braya alpina.
Work
In May 1790, Hoppe had founded the Regensburgische Botanische Gesellschaft, the first botanical organization in Bavaria, and presently the world's oldest existing botanical society. Notable members included Johann Wolfgang von Goethe, Alexander von Humboldt, and Justus von Liebig. From 1812 until his death in 1846, Hoppe was its chairman. He is credited for describing and naming over 200 plant species. Among his written efforts are a work on the flora of Regensburg, titled "Ectypa plantarum ratisbonensium", and "Caricologia Germanica", a book of German caricology that he published with engraverJacob Sturm. From 1818 to 1842, he was editor of the popular scientific journalFlora. In 1825 he collaborated with Christian Friedrich Hornschuch, Jacob Sturm and Jacob Johann Hagenbach to publish an illustrated work on Alpine beetles entitled Insecta Coleoptrata, quae in itineribus suis, praesertim alpinis. Hoppe became an elected member of the Academy of Sciences Leopoldina in 1820. The plant genus Hoppea from the familyGentianaceae is named after him.
