Otto Wilhelm Sonder was a German botanist and pharmacist.
William Gilson Farlow was an American botanist, born in Boston, Massachusetts, and educated at Harvard, where, after several years of European study, he became adjunct professor of botany in 1874 and professor of cryptogamic botany in 1879.
Nikolai Stepanovich Turczaninow was a Russian botanist and plant collector who first identified several genera, and many species, of plants.
Lyman Bradford Smith was an American botanist.
Wu Zhengyi was a Chinese botanist and an academician of the Chinese Academy of Sciences (CAS). Wu specialized in Botanical Geography and Medicinal Botany. He is also known by the alternative spellings of 'Wu Cheng-yih', 'Wu Zheng Yi' and 'Cheng Yih Wu'.
Charles Leo Hitchcock was an American botanist. He discovered 20 species of plants and his works have been cited thousands of times. He is also the primary co-author to the Flora of the Pacific Northwest, still the most up to date flora for three northwest U.S. States to date. A hall at the University of Washington is named in his honor, and he taught thousands of botanists over the course of his teaching career at the University of Washington.
Edward Johnston Alexander was an American botanist who discovered three species and one genus. He is the author or one of the authors of 205 entries in the International Plant Names Index. He was born in Asheville, North Carolina and studied at North Carolina State University from 1919 to 1923. He was a longtime assistant and curator at New York Botanical Garden (NYBG), originally under the guidance of Small. While at the NYBG, he served as an editor of the Garden's botanical journal Addisonia for about thirty years, until the journal ceased publication in 1964.
Cornelis Kalkman was a Dutch botanist.
Amal Amin is an Egyptian botanist.
Hellmut R. Toelken is a South Australian botanist. He retired in December 2008 from the position of senior biologist at the State Herbarium of South Australia, but remains an honorary research associate. Earlier he was with the Botanical Research Institute, Department of Agricultural Technical Services, Pretoria, S Africa.
Lena Tracy Hanks (1879–1944), sometimes credited as Lenda Tracy Hanks, was an American algologist and botanist who specialized in studying North American algae and flora. She is credited with the discovery of Geranium laxum. She worked at the museum of the New York Botanical Garden with John Kunkel Small. The standard author abbreviation Hanks is used to indicate this person as the author when citing a botanical name.
James Sinclair (1913–1968) was a Scottish botanist, who worked at the Royal Botanic Garden Edinburgh and the Singapore Botanic Gardens.
Jean Hector Paul Auguste Ghesquière was a Belgian botanist.
Kaj Borge Vollesen is a botanist.
Jacob Gijsbert Boerlage was a Dutch botanist, who worked principally at the National Herbarium in Brussels.
Nguyên Tiên Bân was a Vietnamese botanist, who worked principally at the Institute of Ecology and Biological Resources in the Vietnam Academy of Science and Technology.
William Franklin Wight was an American botanist. Wight studied at Michigan State College and Stanford University.
James Henderson Ross is an Australian botanist.
Alistair Hay is an Australian botanist. Hay is a former director of the Royal Botanic Garden, Sydney.
Oljga N. Dubovik is a botanist. Dubovik's works are collection and description of spermatophytes in Russia and Ukraine.