Botany, plant science(s), phytology, or plant biology is a branch of biology and is the scientific study of plant life and development. Botany covers a wide range of scientific disciplines that study plants, algae, and fungi including: structure, growth, reproduction, metabolism, development, diseases, chemical properties, and evolutionary relationships between the different groups.
Rolf Singer (June 23, 1906 – January 18, 1994) was a German-born mycologist and one of the most important taxonomists of gilled mushrooms (agarics) in the 20th century. After receiving his Ph.D. at the University of Vienna in 1931 he worked in Munich. By 1933, however, Singer was forced to flee Nazi Germany to Vienna. There he met his wife, Martha Singer.
Anders (Andreas) Dahl (March 17, 1751 – May 25, 1789) was a Swedish botanist and student of Carolus Linnaeus. The dahlia flower is named after him . In 1770, Dahl entered Uppsala University as a freshman (Carolus Linnaeus died in 1778). After receiving the bachelor's degree, he worked in Gothenburg as curator of the private natural museum and botanic garden of Claes Alströmer. In 1786 he received a medical doctor's degree at the University of Kiel, Germany.
Paul Émile de Puydt (1810–1891), a writer whose contributions included work in botany and economics, was born and died in Mons, Belgium. As a botanist, he notably wrote on orchids. The standard botanical author abbreviation De Puydt is applied to species he described.
Paul Petard (1912–1980) was a French botanist who specialized in the study of native plants of French Polynesia. His book Petard Botanical Plant Encyclopedia is still widely used as a reference, and contains much information about traditional applications of Tahitian Noni juice. He held a doctorate in pharmacy.