Jean Pierre Étienne Vaucher
He studied theology at Geneva, and from 1795 to 1821 was a pastor at the Church of Saint-Gervais. From 1808 to 1840 he was a professor of church history at the University of Geneva, and for a number of years he also taught classes in botany. Among his better-known students were botanist Augustin Pyramus de Candolle (1778-1841), scientist Hans Conrad Escher von der Linth (1767-1823) and Charles-Albert (1798-1849), the future King of Sardinia.
Vaucher is remembered for his research involving the developmental history of algae. In his 1803 treatise Histoire des Conferves d'eau douce, he described the process of conjugation in certain algae as a distinct sexual process. The phenomena of conjugation is a means of fertilization that takes place in green algae such as Spirogyra. He is credited for describing the development of the networks that occur in the cells of Hydrodictyon (water net algae), and for describing the pyrenoid of algae.
- Histoire des conferves d'eau douce (1803)
- Histoire physiologique des plantes de l'Europe, 4 volumes (1804)
- Mémoire sur les seiches du lac de Genève (1805)
- Monographie des orobanches (1827)
- Souvenir d'un Pasteur Genevois, ou recueil de sermons (1842)
- Parts of this article are based on a translation of an equivalent article at the German Wikipedia.