Ernst Hugo Heinrich Pfitzer (26 March 1846 – 3 December 1906) was a German botanist who specialised in the taxonomy of the Orchidaceae (orchids).
Pfitzer was born in Königsberg. He studied chemistry and botany at Berlin and Königsberg, receiving his PhD in 1867. Afterwards he worked as assistant to Wilhelm Hofmeister in Heidelberg and under Johannes von Hanstein at the University of Bonn, where he obtained his habilitation in 1869.From 1872 to 1906 he was a professor and director of the botanical garden at Heidelberg.
In the first edition of Die Natürlichen Pflanzenfamilien , a work by Adolf Engler and Carl Prantl, he collaborated about orchids (published in 1889).
In addition to his work involving orchids, he conducted important research of diatoms, publishing the treatise "Untersuchungen über Bau und Entwicklung der Bacillariaceen (Diatomaceen)" (1871) as a result.
He died in Heidelberg, aged 60.
Friedrich Richard Rudolf Schlechter was a German taxonomist, botanist, and author of several works on orchids.
Heinrich Gustav Reichenbach was a botanist and the foremost German orchidologist of the 19th century. His father Heinrich Gottlieb Ludwig Reichenbach was also a well-known botanist.
Leopold Joseph Franz Johann Fitzinger was an Austrian zoologist.
Johannes Jacobus Smith was a Dutch botanist who, between years 1905 to 1924, crossed the islands of the Dutch East Indies, collecting specimens of plants and describing and cataloguing the flora of these islands. The standard botanical author abbreviation J.J.Sm. is applied to plants described by J.J. Smith.
Heinrich Gustav Adolf Engler was a German botanist. He is notable for his work on plant taxonomy and phytogeography, such as Die natürlichen Pflanzenfamilien, edited with Karl A. E. von Prantl.
Karl Anton Eugen Prantl, also known as Carl Anton Eugen Prantl, was a German botanist.
Wilhelm Friedrich Benedikt Hofmeister was a German biologist and botanist. He "stands as one of the true giants in the history of biology and belongs in the same pantheon as Darwin and Mendel." He was largely self-taught.
Johannes (Hans) Gottfried Hallier was a German botanist born in Jena.
Friedrich (Fritz) Wilhelm Ludwig Kränzlin was a botanist associated with the Natural History Museum (BM).
Gomesa is a genus of flowering plants from the orchid family, Orchidaceae. It contains about 80–100 species, all native to South America. The genus is abbreviated as Gom.
Graphorkis is a genus of flowering plants from the orchid family, Orchidaceae. It contains 4 known species, native to Africa and to Madagascar and other islands of the Indian Ocean.
Ernst Heinrich Georg Ule was a German botanist.
Victor Félix Schiffner was an Austrian bryologist specializing in the study of hepatics.
Leslie Andrew Garay was an American botanist. He is the retired curator of the Oakes Ames Orchid Herbarium at Harvard University, where he succeeded Charles Schweinfurth in 1958. In 1957 he was awarded a Guggenheim Fellowship.
Carolus Adrianus Johannes "Karel" Kreutz is a Dutch orchidologist, botanical writer and taxonomist, currently affiliated with the Centre for Biodiversity Naturalis in Leiden, Netherlands. He is regarded as an exceptionally experienced orchidologist, and has published orchid floras of Cyprus, Turkey, Rhodes, Crimea, Netherlands, Belgium and Germany, and is currently preparing a major overview in ten volumes of all Orchid taxa in Europe, North Africa and the Middle East, employing modern taxonomy, nomenclature and research techniques.
Johannes (Hans) Theodor Gustav Ernst Fitting was a German plant physiologist. He was the son of law professor Heinrich Hermann Fitting.
Wilhelm Schacht was a German botanist, gardener, photographer and author. He became known for being senior staff member of Botanischer Garten München-Nymphenburg, whose open air department he took care of for 21 years.
Erich Nelson was a German artist, scientific illustrator, and botanist. He became well-known for his precise and aesthetic aquarelles and illustrations of European orchids, which total more than 2,000. His botanical and mycological author citation is: „E.Nelson“.