Genus Guettarda
Pictures from Observations
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For Jean-Étienne Guettard (1715–1786), French physician, naturalist, botanist and geologist (mineralogist). He was curator of the natural history collection of the French scientist René de Réaumur (1741), a member of the Faculty of Medicine of Paris (1742) and one time médecin botaniste to the French Prince Louis, Duc d’Orléans (1747–1752). He was the first to map France geologically, his Atlas et Description Minéralogiques de la France (1780) showing the mineralogical distributions of much of Europe. He was one of the first scientists to notice the relationship between the distribution of plants and the soils and subsoils. During his research he discovered (1765) Kaolin clay in Alençon, which resulted in the production of Sèvres porcelain.